女人毛片a级大学毛片免费,女人18毛片a,毛片女人,12至16末成年毛片,欧美一级欧美一级高清,毛片线看免费观看,2020久久国产最新免费观看

ONLINE STORE

Copper Tungsten Contact

Product Name:Copper Tungsten ContactPlace of Origin:Gau, China (Mainland)Brand ...

Moving Arc Contact

Product Name:Moving Arc ContactPlace of Origin:Gau, China (Mainland)Brand Name:...

ADVERTISING VIDEO

Why Choose Us

We are specialized in manufacturing electrical alloy materials. Our product ranges include electrical alloy contact products, refractory metals products and powder metallurgy products and materials with wear resistance, heat resistance, and corrosion resistance properties, which are widely used in circuit breakers field of power transmission and aerospace industry.

Advantages of Tianshui XD:

1. Professional in the production of electrical alloy material and contacts

2. We have made high-voltage contacts for forty years.

3. Leading the development of tungsten based high-voltage in the research of new products and process improvement.

4. Reached and exceeded the requirement of GB8320.