国产a一级毛片视频国语,久久久国产精品免费视频,国产亚洲欧美91水蜜桃,欧美丰满熟妇高清xxxx

The PTFE (polytetrafluoroethylene) sprayed on the valve ring of petroleum machinery has the following characteristics: 1. Good chemical stability: PTFE has excellent chemical stability and can resist corrosion from petroleum and related media. Whether it is crude oil, refined oil, or petroleum products containing various chemical additives, it is difficult for PTFE to undergo chemical reactions.

The Xylan coating on the valve stem has the following characteristics: 1. Low friction coefficient: The friction coefficient can be as low as 0.005, which can effectively reduce the friction between the valve stem and other components, reduce the degree of wear, extend the service life of the valve stem and related components, and also help the flexible operation of the valve, reducing operating

The valve stem is sprayed with PTFE (polytetrafluoroethylene) for the following purposes: 1. reduce friction coefficient: PTFE has a low friction coefficient. Spraying on the valve rod can make the valve rod smoother in the process of movement, reduce friction with other parts, reduce the operating torque, make the opening and closing of the valve more flexible, reduce wear, and extend the servic

Lithium battery equipment sprayed with tungsten carbide has the following characteristics: 1. High hardness and wear resistance Tungsten carbide has high hardness, and spraying it on lithium battery equipment can effectively improve the wear resistance of the equipment surface. For example, in the production process of lithium batteries, some components of the equipment, such as the scrap

Spraying Teflon on the lithium battery silo can significantly improve the performance of the silo, and has good effects in improving production efficiency, ensuring product quality and reducing maintenance costs, as follows: 1. improve production efficiency Promote material flow: the low friction coefficient of Teflon can make the flow of lithium battery materials in the silo more smooth,

Lithium battery equipment plasma sprayed aluminum oxide coating has many advantages, mainly including the following points: 1. good insulation performance: the alumina coating has high resistivity, which can effectively prevent the current leakage inside the battery, avoid battery short circuit, and improve the safety and stability of the battery. This is very important for the reliable operation