日本亚欧乱色视频在线系列-欧美午夜强奸乱伦-亚洲男男gay-免费男人下部进女人下部视频-国产乱女乱子视频在线播放 -帅小伙自慰videogay男男-国产乱码在线精品可播放-女同亚洲一区二区三区精品久久

ENGLISH
banner
Copper Ingot

Copper, copper content of more than 99%, copper products with excellent ductility, easy to shape a variety of shapes. Copper in the refrigeration, plumbing, electromechanical and other industries have a wide range of applications. Copper cooling tube, with a very good thermal conductivity, and easy processing molding, welding simple, long life and other advantages; copper plumbing pipe, drinking water has a very good bactericidal effect, the service life can be up to a hundred years, and can be almost 100 % Recovery and reuse; copper inside the pure copper has a very excellent conductivity, in the power, electric furnace, nuclear power and other fields have a wide range of applications.