chinese裸体男野外gay,亚洲成色WWW成人网站,欧美va天堂va视频va在线,公交车上掀起JK裙子挺进去

Non-standard tungsten alloy bushing acts as a positioning or protection shaft on the shaft to prevent shaft. At the same time, it has low hardness requirements for the grinding shaft, and the shaft that has not been quenched and tempered can be used, thereby reducing the processing difficulty of the related parts. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html The bushings have different uses for different occasions, can be axially positioned, can reduce the shock absorption, and can also be used…

Tungsten alloy anticorrosion sleeve has excellent characteristics of corrosion resistance, scale prevention, high temperature resistance, high pressure resistance, as well as anti-hydrogen sulfide, carbon dioxide, oxygen and other gas corrosion environment, so tungsten alloy corrosion sleeve is applied in: oil fields of various Wells, Wells, gas Wells. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html Chinatungsten Online is a modern company specializing in the production, sales and import and export of non-ferrous metal materials and products such as tungsten and molybdenum products…

Tungsten alloy geological drill tube is a kind of tungsten alloy tube used for core drilling by the geological department. It also is a long-length tungsten alloy tube for geological drilling with hollow section and no joints around it. It has high strength, high hardness, good wear resistance, high impact toughness, good corrosion resistance and so on. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html Since the drilling tube is to be drilled to a depth of several kilometers, the working conditions…

Tungsten alloy oil drilling tube is a tungsten alloy seamless pipe used for thickening or external thickening at both ends of oil drilling. It has sufficient strength, hardness, wear resistance and impact toughness, which is mainly used for petroleum and geological drilling. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html Tungsten alloy oil drilling tube can work deep into the depths of several thousand meters underground, and the conditions are extremely complicated. When working, it is subjected to stress such as tension,…

Tungsten alloy pumping tube mainly carries oil and gas from the bottom of the well to the surface. It has good corrosion resistance, high temperature resistance, good wear resistance, which can meet the basic requirements of petroleum machinery durable operation. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html Chinatungsten Online is a modern company specializing in the production, sales and import and export of non-ferrous metal materials and products such as tungsten and molybdenum products and tungsten and molybdenum alloys. The company…

Tungsten alloy tube for petroleum is mainly used for drilling oil and gas wells, or conveying oil and gas. It includes oil drill pipes, oil casings, and oil tubes. It has good high temperature resistance, high pressure resistance, good corrosion resistance and anti-fouling performance, which also has a long service life and can save costs. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html In the process of petroleum exploration and development, special tubing plays an irreplaceable role. As most oil fields in…

Tungsten alloy tube jacking is to set tube jacking head at the front of the tube, break the soil in front into rheological soil or mud through the tube jacking head, and push the pipe forward through the jack at the back of the tube. Its construction has the advantages of less occupied space and weak influence on the ground, traffic, environment and surrounding underground pipelines. It has been widely used in the construction of drainage tubes. More product details,…

Tungsten alloy tube for thermocouple protection has high thermal conductivity, small thermal expansion coefficient, good high temperature resistance, good corrosion resistance, high thermal strength, good thermal shock resistance and a certain resistance to temperature changes of the comprehensive performance. It has good oxidation resistance at high temperature and can be used in the upper limit of thermocouple temperature measurement without deterioration and deformation. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html Thermocouple has become the most widely used temperature sensor in the…

Tungsten alloy wear sleeve has high density, high hardness, low thermal expansion coefficient, good wear resistance, strong corrosion resistance, which is widely used as wear-resistant parts. Tungsten alloy wear sleeve provided by Chinatungsten Online is wrapped with moisture-proof paper and packed in wooden box. The box is filled with foam plastic to avoid problems during transportation. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html In moving parts, the wear of the parts is caused by long-term friction. When the parts are worn…

Tungsten alloy tube sleeve has high density, high strength, low expansion coefficient, good corrosion resistance and mechanical processing. It is widely used in electronic power equipment manufacturing industry, metal material processing industry, glass manufacturing industry, high-temperature furnace structure parts manufacturing, petrochemical industry, aerospace and national defense industry. More product details, please visit: http://www.tungsten-alloy.com/tungsten-alloy-tube.html Chinatungsten Online has high-end equipment, superb talents, superb technology, perfect measurement and testing methods, and quality assurance system, which has passed ISO9001:2015 quality management system certification. Tungsten…