Abstract: In today’s world, the overall output of China’s steel industry accounts for more than 50% of the world’s steel output; however, China’s steel industry is dominated by lengthy processes featuring multiple steps, high energy consumption, wide variety of pollutants, and large amounts of pollutants. The steel industry is a pillar of China’s national economy, and it involves a wide range of related industries; thus, it plays a pivotal role in the development of the national economy. With the continuous strengthening of air pollution control, especially since the implementation of ultra-low emissions in the thermal power industry, the main pollutant emissions of the iron and steel industry have exceeded that of the power industry. Thus, becoming the largest source of industrial pollutants. Unfortunately, the emission of huge amounts of pollutants greatly restricts the pace of economic and social progress. Since the 13th Five-Year Plan, a series of powerful measures have been introduced at the central to the local levels to promote ultra-low emissions throughout the steel industry. With the deepening of ultra-low emissions in China’s iron and steel industry, in-depth governance of the iron and steel industry is imminent. This article summarized several traditional multi-pollutant control technologies and discussed “multi-pollutant synergistic removal technology based on the magnesium method”. Four new types of ultra-low emission technologies in the iron and steel industry were summarized: “multi-pollutant collection and adsorption removal technology for flue gas”, “multi-pollutant mid-low temperature synergistic catalytic purification technology”, and “sintering flue gas circulation technology”. The necessity and difficulties of ultra-low emissions in the industry, the rationalization of recommendations for promoting ultra-low emissions, and the prospects for the next step in deepening ultra-low emissions in the steel industry (source governance) were discussed. It is beneficial to promote the coordinated control and treatment of multiple processes and multiple pollutants in the steel industry.
Abstract: Polycyclic aromatic hydrocarbons (PAHs) are a type of persistent organic pollutants with carcinogenic, teratogenic, and mutagenic effects. Moreover, the derivatives of PAHs, including nitro-PAHs (NPAHs) and oxygenated-PAHs (OPAHs), have strong oxidizing properties, and their mutagenicity and carcinogenic potential can reach 10 times and 100,000 times of the parent PAHs, respectively. Various epidemiological and toxicological studies have shown that PAHs and their derivatives are closely related to the occurrence and growth of many critical diseases. Therefore, PAHs have received immense attention in academics and is becoming a hot topic in scientific research. In recent years, a rapid increase in the number of motor vehicles has resulted in emissions from vehicles that have become one of the primary sources of PAHs and their atmospheric derivatives in almost all large and medium-sized cities. Based on the previous research, this review has summarized several standard sampling methods for vehicle exhaust, including bench experiment, vehicle-mounted experiment, tunnel experiment, and roadside experiment, and concluded the characteristics of PAHs and their derivatives from vehicle emissions (i.e., emission factor, gas-particle phase partitioning, source profiles, the influence of vehicle type, operating condition, and vehicle mileage). This review also provides scientific references for collecting sampling methods under various research demands by formulating emission reduction measures for motor vehicles. The oxygen content of ethanol–gasoline is higher than that of regular gasoline. The use of ethanol–gasoline can reduce many kinds of harmful substances in vehicle exhaust. At the same time, as straw is one of the raw materials of bioethanol, the promotion of ethanol gasoline for vehicles is also an important measure to solve the problem of burning agricultural waste such as straw and reduce the emission of pollutants. In this context, China plans to promote using vehicles with the ethanol–gasoline fuel nationwide in 2020 to alleviate the problem of pollution due to energy and motor vehicle emissions. However, there are certain differences in the properties between ethanol–gasoline and regular gasoline; hence, the impact of ethanol-blended gasoline on emissions from motor vehicles has attracted the attention of researchers. This paper reviewed the effect of ethanol-blended gasoline on the variation of pollution characteristics of PAHs and discussed their derivatives. Some useful suggestions for future research directions in this field are made, and scientific and reasonable references for the prevention and control measures of motor vehicle emission reduction are provided.
Abstract: Red mud is a strong alkaline solid waste that is discharged from alumina production process. Its cumulative storage and annual emission are huge with about 0.8–1.5 t of red mud emitted for 1 t of alumina produced. As of 2018, the global cumulative emissions of red mud were about 4 billion t and increased by 120 million tons annually. In China, about 100 million tons of red mud are discharged annually and the comprehensive utilization rate of red mud is about 4%, which is mainly stored in the Red Mud Dam. This often causes serious damage to the surrounding environment, as the red mud with high alkalinity and radioactivity raises the alkalization of soil and leaching into the groundwater through diffusion and infiltration. The comprehensive utilization of red mud is mainly to prepare building materials, ceramics materials, new functional materials, and recover valuable metals. As a low-cost, efficient, and safe environment-friendly environmental purification technology, photocatalytic technology is considered to be one of the best solutions to the severe energy crisis and environmental pollution problems that the world is currently facing. Semiconductor photocatalytic materials (such as Fe2O3, TiO2, ZnO) have been widely studied in the degradation of organic pollutants in water. Red mud is rich in iron oxides and has a high specific surface area and pore structure. In recent years, red mud-based photocatalytic materials have attracted much attention in the photocatalytic degradation of organic pollutants in water. In this paper, the characteristics of red mud were introduced. The preparation methods of red mud-based photocatalytic materials were summarized and its application in the photocatalytic degradation of organic pollutants in water was summarized. The mechanism of red mud-based photocatalytic materials for degradation of organic pollutants in water was described, and the existing problems of these materials were discussed. Finally, the future development trend of red mud-based photocatalytic materials was proposed based on previous research results.
Abstract: Unconventional natural gas is a type of high-quality clean energy, which often contains some gases as impurities that cause reductions in its combustion heat value and utilization efficiency. Therefore, developing gas separation technologies to remove or separate these impurity gases and concentrate methane content is necessary. As a newly emerging gas separation technology, hydrate-based gas separation technology currently requires exploration on ways to greatly increase hydration rate to promote its industrial application. Screening green and environmentally-friendly promoters has become a research hotspot in recent decades. Amino acids, starch, and other biological substances have attracted much attention owing to their wide accessibility and environmental protection. Ionic liquids (ILs), which are a new type of lowly volatile and recyclable solvents, exhibit excellent performance in promoting gas hydrates formation and growth. Furthermore, ILs exhibit adjustable and controllable structures, which make them potential promoters in hydrate-based gas separation. Presently, no universally recognized theory on hydrate formation mechanism exists for various promoters. In this paper, different promotion mechanisms of gas hydration were described and discussed in detail, which included surface tension reduction theory, critical micelle theory, capillary effect theory, template effect theory, and surface hydrophobic effect theory. Both traditional promoters (e.g., THF, CP, and SDS) and bio-environmental promoters (e.g., amino acids and starch) were reviewed in the terms of gas hydration equilibrium condition, dynamic regularity, and hydrates-acceleration mechanisms. Particularly, the application of ILs, which are a type of semi-clathrate promoter, in gas hydration was elaborated. Study on the structural properties of promoters, their aggregation morphology in water, and intermolecular interactions between ILs, gases, and water is necessary for the establishment of a promoter-screening system for various gas hydrations.
Abstract: The study of multi-field coupling of rocks is currently a pressing and difficult problem at present. To better analyze the interaction mechanism of rocks under of multi-field coupling, research is mainly carried out by experiment and numerical simulation. On the basis of summarizing the research and development of multi-field coupling micro-meso-macro multi-scale mechanical test equipment at home and abroad, and the developments of numerical simulation software and coupling calculation program, the development direction of rock mechanical test equipment and numerical analysis under multi field and multi-phase coupling are prospected. To study the mechanical properties of rocks under multi-field coupling, a multi-field coupling test system with different physical fields was designed by improvement through research and development. Based on the development of the test equipment, modern non-destructive detection methods, such as real-time computed tomography (CT) scanning technology, scanning electron microscopy (SEM), nuclear magnetic resonance imaging (NMRI), X-ray stereo imaging and ultrasonography, were developed. Acoustic wave technology can not only nondestructively detect the micro-structure and evolution process of rock internal pores, but also clarify the macro-relationship of rock physical fields in the multi-field coupling action of thermal-hydrological-mechanical-chemical (THMC), and further clarify the rock performance under multi-field coupling action from the perspective of a combination of micro and macro scales. With the advancement of computer technology, the development of numerical simulation software and coupling calculation program under multi-field coupling of rock has made certain progress. Especially, the development of the numerical simulation software of THMC four-field coupling interaction combined with TOUGHREACT and FLAC3D, and the multi-field coupling calculation program of Comsol docking with MATLAB provide technical supports for the development of multi-field coupling simulation of rocks. Finally, the key difficulties and future research directions of rock multi-field coupling research were discussed and analyzed, which can provide a reference for engineering practice and related problems.
Abstract: Metal sulfides are highly desirable owing to their semiconductor properties promoting electrochemical reactions for sulfide flotation. As the most common sulfide mineral, pyrite is found in coal and can contain a small amount of gold. The potential of electrochemical reactions for the beneficiation of pyrite makes it necessary to study its electrochemical behavior. The present work focuses on the electrochemical behavior and working mechanisms of pyrite in mineral processing. The effects of the structural characteristics of pyrite, oxidation in solution, the presence of metal ions, and inhibitors on the electrochemical behavior of pyrite were discussed emphatically. The effects of galvanic interaction and grinding medium shape, material, and atmosphere on the electrochemistry of pyrite in grinding were also discussed. It has been shown that the different crystal structures and semiconductor properties of pyrite can greatly influence the oxidation of its surface, which indirectly affects its floatability. Moreover, moderate oxidation conditions are beneficial to the collector-free flotation of pyrite, whereas strong reduction or oxidation potentials inhibit its flotation. It has also been shown that increase in potential and iron oxide on the pyrite surface lead to the decrease in the concentration of copper (Cu+) ions, thereby adversely affecting the activation of pyrite by copper. Furthermore, inhibitors can directly participate in the redox reaction between the collector and pyrite, thus inhibiting the flotation of pyrite. Different grinding media and atmosphere conditions also affect the electrochemical behavior of pyrite.
Abstract: Laminated metal composites are composed of two or more metals or alloys, which integrate various excellent properties of the component materials and exhibit good comprehensive properties. The history of laminated metal composites can be traced back to more than 800 BC, and their systematic research began in the 1970s. Over the past 30 years, various methods have been invented to fabricate laminated metal composites, including explosive bonding, rolling bonding, hot-pressing bonding, and deposition bonding. Explosive bounding method has irreplaceable advantages in the preparation of medium thick plates with its products being widely used in military industry, ship, electric power, chemical industry, and other fields. On the other hand, rolling bonding is most widely used because of its ability of large quantity production. Cold roll bonding (CRB) and accumulative roll bonding (ARB) are two representative laminate preparation technologies that are utilized in the fabrication of a large number of material systems. Up to now, laminates prepared by rolling bonding are widely used in automobile, ship, aerospace, and other fields. The preparation of Ti/Al, Ti/TiAl, and Ti6Al4V/TiAl layered composites via vacuum hot-pressing bonding has attracted much attention in recent years because of its ability to avoid gas pollution such as oxygen production. Moreover, laminated metal composites produced by deposition bonding have great potential as corrosion resistant coatings, wear-resistant coatings, and high-strength conductors and implants. Although laminated metal composites have been well developed, there are still various problems to be solved. For some soft/hard material systems, the hard layer introduces plastic instability during the rolling process that destroys the continuity between layers. As a consequence, serious weakening of the comprehensive performance of the laminates is observed. Furthermore, only few studies on the design and new processes of laminated metal materials have been conducted. This paper reviewed the development of laminated metal composites, introduced the preparation methods and advantages and disadvantages of layered metal composites, and analyzed the research status of laminated metal composites at home and abroad.
Abstract: Magnesia refractories are promising high-temperature structural materials known for their high melting point, excellent high-temperature stability, and promising mechanical properties, which make them suitable for numerous high-temperature applications in steel manufacturing, metallurgy, building materials, and ceramics. However, traditional magnesia refractories do not meet the requirements established for advanced refractories. Low-carbon magnesia carbon refractories have several disadvantages, including poor slag and thermal shock resistances, owing to their reduced carbon content. Magnesia calcia refractories have poor hydration resistance due to the presence of free calcium oxide. Moreover, magnesia alumina refractories have poor sintering and mechanical properties owing to their volumes and thermal expansion mismatch. Therefore, the techniques used to prepare high-performance magnesia refractories have attracted widespread attention. Recently, nanotechnology has emerged as a promising new technology that is widely used improve refractory yield and in many other applications because of its excellent surface properties, small size, quantum dimensions, and macro quantum effects. The preparation of magnesia composite refractories using nanotechnology relieves the demand for high-performance magnesia refractories by high-temperature industries and also contributes to the development of lightweight and functional value-added products. Therefore, the use of nanotechnology in the preparation of magnesia composite refractories has great significance for the enhancement of their properties. In this paper, the research status and progress of nanotechnology in recent years with respect to the damage mechanisms in low-carbon magnesia–carbon refractories, magnesia calcia refractories, and magnesia alumina refractories in China and overseas were reviewed. In addition, the interaction mechanisms were analyzed, the challenges and developments in the application of nanotechnology were discussed.
Abstract: Titanium/steel composite plate is an advanced metal-layered composite material, which is composed of titanium or titanium alloy as the cladding material and carbon steel or stainless steel as the base material. Titanium/steel composite plate is widely used in petrochemical, electric power, salt chemical, seawater desalination, and ocean engineering since it has excellent corrosion resistance of the cladding material and the characteristics of high strength and low cost of the base material. Various methods have been adopted for manufacturing titanium/steel composite plates, including explosive bonding, explosive-rolling bonding, diffusion bonding, and hot rolling bonding. However, with the continuous expansion of the application field of titanium/steel composite plate, demands on new requirements on the material’s size, interface bonding quality, and mechanical properties are difficult to meet with the existing preparation methods and processes of titanium/steel composite plate. Thus, it is necessary to study the interface recombination mechanism and interface precipitation behavior, improve the interface bonding quality, and develop novel preparation methods. In response, this paper summarized the research and development status of titanium/steel composite plates based on different aspects such as raw materials, composite plate size, interface characteristics, and mechanical properties. The main processing methods of titanium/steel composite plate were also reviewed. The influence of surface treatment method, hot rolling temperature, transition layer metal, and heat treatment process on the interface of titanium/steel composite plate was summarized, and the application status and development trend of titanium/steel composite plate were described. Finally, the main problems and future research direction of titanium/steel composite plate were pointed out. This study aims to provide a reference for in-depth theoretical research of titanium/steel composite plate, promote its progress preparation technology, and broaden its application field.
Abstract: Titanium carbide is a typical transition metal carbide that has been widely used in the machinery manufacturing, chemical, electronic, and metallurgical industries because of its many unique properties such as high hardness, high melting point, good wear resistance, and good electrical conductivity. With continuous expansion in the applications of titanium carbide materials, the market has developed new requirements on the purity, particle size, particle size distribution, and microstructure of titanium carbide materials. Addition of titanium carbide to the surface of some materials or plated substrates to alter the internal or surface microstructure of the materials and improve the physical or chemical properties of the materials can provide new application prospects in metal matrix composites, ceramic composites, and coating materials. Titanium carbide materials possessing better dispersion, uniform particle size, good crystallization, and good stoichiometry are desired in biosensors, hard coatings, composite electrodes, electrocatalytic active materials, foam stabilizers, and other applications. Titanium carbide is synthesized through various methods such as carbothermal reduction, mechanical alloying, self-propagation high-temperature synthesis, and molten salt-assisted synthesis. Often, synthesis methods of titanium carbide require high reaction temperatures and result in the poor dispersion of powder particles. Therefore, an energy-saving method having high efficiency and in which the purity and morphology of the powder particles can be controlled needs to be developed. This method can be used to develop various kinds of powder materials. Among various preparation methods, molten salt-assisted synthesis (MSS) has gained an increasing amount of attention due to its low preparation temperature, short reacting time, and high efficiency. In recent years, tremendous progress has been made in the development of the MSS method. The MSS method can be used to prepare titanium carbide powders, titanium carbide coatings, and titanium carbide fibers with varying particle sizes, morphologies, and purities. This review offered a retrospection on the research studies conducted on the preparation of titanium carbide materials via molten salt-assisted methods in China and worldwide, and this review provided elaborate descriptions about the advantages and disadvantages of various preparation methods such as carbon/metal thermal reduction, electrochemistry, direct carbonation, and microwave heating. This review mainly focused on the preparation process, preparation principle, purity of products, and morphology. In this review, key issues such as eliminating impurities, increasing purity of titanium carbide, and controlling the morphology of titanium carbide were discussed, and relevant researches topics that can be done in the future were proposed. This review helps provide a reference for the low-cost and high efficiency production of high-quality titanium carbide materials.
Abstract: In today’s world, global problems such as a shortage of fossil fuel energy, environmental pollution, and global warming are becoming increasingly serious. For the development of human society, sustainability is particularly important. Energy is the basis for human survival and promotes the development of human society. However, rapid growth in population and the global economy has led to a significant increase in energy demand. At the same time, extensive use of fossil fuels has polluted the environment and led to a shortage of fossil energy. Currently, with the continuous increase in energy consumption and development of human society, there is a pressing need to develop energy storage technology. Latent heat storage, using phase change materials that play a vital role in the field of energy storage, has been widely accepted as an effective way to improve heat energy utilization. Phase change materials provide a type of thermal energy storage that can store a large amount of latent heat through physical phase change. This heat is then released in a controlled manner within a small temperature change based on thermal energy requirements. At present, phase change materials have important applications in aerospace, industrial and agricultural production, building materials, energy and power, textile materials, highway transportation, and engine technology. Most current research on phase change materials focuses on medium- and low-temperature materials, especially those materials whose phase change temperature is lower than 100 ℃. There is less research on high-temperature phase change materials owing to the encapsulation and corrosion of such materials. The problem of performance is difficult to solve, yet high temperature phase change materials are in urgent need in some extreme high temperature environments. High-temperature phase change materials (HTPCM) can control thermal energy under extremely high temperatures. They have important prospects for application in the fields of thermal protection and thermal management in high-temperature environments such as aerospace, solar energy, etc. The microencapsulation of phase change materials can solve the problem of melt exudation of these materials during the phase change process, improve the environmental adaptability of these materials, and expand their applications. This article mainly reviewed the preparation and application of HTPCM above 300 ℃. The classification of phase change materials, the method of synthesis of microcapsules, and the preparation of high temperature microcapsules were discussed. Through research, it is found that fluoride microcapsules, with their high melting point and enthalpy value, are a promising material in the field of HTPCMs.
Abstract: In recent years, smart watches and folding-screen phones have become increasingly popular in the electronic market. This trend signifies that consumers nowadays not only pursue high performance of electronic devices but also demand higher comfort from electronic devices. With the improvement of material properties and progress in microelectronics technology, flexible materials and electronic devices have developed rapidly in recent years, forming a research hotspot in the electronics industry. Flexible electronic devices can achieve different deformation states owing to their small size, deformability, and portability. Unlike traditional electronic devices integrated with rigid materials such as silicon, flexible electronic devices can also undergo various mechanical deformations such as stretching, torsion, bending, and folding during usage, which meets the people's requirements for portable, lightweight, and deformable electronic devices. The unique characteristics of flexible electronic devices and materials will promote the innovative development of electronic skin, smart robots, artificial prostheses, implantable medical diagnosis, flexible displays, and the Internet of Things, which will eventually result in tremendous changes in our daily lives. As a new generation of metal materials, high-entropy alloys and metallic glasses have exhibited excellent physical, chemical, and mechanical properties owing to their unique structural characteristics, which show great potential in flexible electronics applications. However, the rigidity of the material itself cannot meet the requirements of deformable electronic devices. Therefore, it is necessary to realize the desired flexibility in these materials by reducing dimensions and designing microstructures. This paper briefly described the mechanical properties and preparation methods of high-entropy fibers and introduced the preparation methods, structural characteristics, and unique properties of high-entropy films as potential flexible materials. Applications of metallic glass in electronic skin, flexible electrodes, and microstructure designing were then summarized. Finally, the shortcomings of the existing work were discussed and the prospects for the development of flexible electronics in the future were presented.
Abstract: Two-phase flow (Gas-liquid) in pipelines is widely present in many fields, such as nuclear industry, chemical industry, and petroleum transportation. Compared with single-phase flow, the density, pressure, and momentum flux in two-phase flow change greatly in the flow. When flowing through a valve, elbows, tees, and other components, a pulsating force is induced, which is termed as the “flow-induced force.” Flow-induced force causes pipeline vibration. If the vibration frequency is close to the natural frequency of the pipeline, a resonance phenomenon occurs that can further increase the vibration amplitude of the pipeline and consequently cause fatigue damage to the pipeline system. Therefore, research on flow-induced force is of great significance for the safe design and operation of pipelines. In this paper, the research progress on the mechanism, influencing factors, and calculation models of flow-induced force was reviewed. The results show that the change of momentum flux is the dominant factor in causing flow-induced force. The pressure fluctuations, pulsation of the liquid slug, and the volatile liquid wave also contribute to force fluctuation. This study aims to establish a complete theoretical system of flow-induced force mechanism that shows varying wave characteristics with different flow patterns. Most of the current studies focus on single horizontal pipe or riser pipe. With the development of deep-sea oil and gas, demand on gathering and transportation-riser pipeline systems is increased, making it a great engineering significance to study the flow-induced force in a variety of pipeline-riser systems. The empirical and theoretical models are gradually established. The ability of CFD software to simulate flow field and excitation force offers numerous advantages. Therefore, research on the accuracy of CFD software calculation results and the comparison and optimization of effective CFD calculation simulation methods will have important scientific research value for development in the future. This article comprehensively summarized the current research status of gas-liquid two-phase internal flow excitation, which can provide guidance for further related research.
Abstract: Material microstructure data are an important type of data in building intrinsic relationships between compositions, structures, processes, and properties, which are fundamental to material design. Therefore, the quantitative analysis of microstructures is essential for effective control of the material properties and performances of metals or alloys in various industrial applications. Microscopic images are often used to understand the important structures of a material, which are related to certain properties of interest. One of the key steps during material design process is the extraction of useful information from images through microscopic image processing using computational algorithms and tools. For example, image segmentation, which is a task that divides the image into several specific and unique regions, can detect and separate each microstructure to quantitatively analyze its size and shape distribution. This technique is commonly used in extracting significant information from microscopic images in material structure characterization field. With great improvement in computing power and methods, a large number of image segmentation methods based on different theories have made great progress, especially deep learning-based image segmentation method. Therefore selecting an appropriate evaluation method to assess the accuracy and applicability of segmentation results to properly select the optimal segmentation methods and their indications on the direction of future improvement is necessary. In this work, 14 evaluation metrics of image segmentation were summarized and discussed. The metrics were divided into five categories: pixel, intra class coincidence, edge, clustering, and instance based. In the application of material microscopic image analysis, we collected two classical datasets (Al–La alloy and polycrystalline images) to conduct quantitative experiment. The performance of different segmentation methods and different typical noises in different evaluation metrics were then compared and discussed. Finally, we discussed the advantages and applicability of various evaluation metrics in the field of microscopic image processing.
Abstract: Spurred by the rapid integration of unmanned aerial vehicles (UAVs) in modern military missions, significant research has been performed in the field of autonomous aerial refueling with a focus on the detection, control, and guidance of the tanker and receiver. The concept of aerial refueling has been highly valued in the military since it was first proposed in 1917. Through aerial refueling, an aircraft can significantly expand its combat range, extend its flight time, and improve its carrying capacity; thus, its combat effectiveness can be greatly improved. Furthermore, aerial refueling is gradually showing its merits in the civil domain; for example, it can be used to increase the travel distance of postal aircraft. There are two main types of aerial refueling: flying boom refueling (FBR) and probe-drogue refueling (PDR). Compared with FBR, PDR meets the requirements of UAVs such as high flexibility, high safety, and simplicity. Thus, PDR is more suitable than FBR for unmanned aerial systems. Unique advantages of PDR have allowed it to become the most extensively used refueling method, and the study of PDR has attracted increasing attention. However, the most important and complicated part in such studies is the modeling and control design of a refueling hose system. This paper described the results of a study conducted on the modeling and control design of PDR. First, this paper summarized the main types of aerial refueling and analyzed the characteristics of PDR. Subsequently, two types of modeling of PDR were introduced: lumped parameter system and distributed parameter system. Next, based on the modeling of the aerial refueling hose system, the control design of docking control, vibration control, and controllable drogue was analyzed for the entire process of aerial refueling. Finally, avenues for future research on the modeling and control design of PDR such as the accuracy of the model, complexity of the control system, and details of the working environment at various altitudes were discussed.
Monthly, started in 1955 Supervising institution：Ministry of Education Sponsoring Institution：University of Science and Technology Beijing Editorial office：Editorial Department of Chinese Journal of Engineering Publisher：Science Press Chairperson：Ren-shu Yang Editor-in-Chief：Ai-xiang Wu ISSN 2095-9389CN 2095-9389
