An environmental friendly Bi-brass with cutting-free and excellent properties was developed to substitute for Pb-brass.

研制了一种性能优异的易切削铋黄铜来替代有毒的铅黄铜。

youdao

An environmental friendly Bi-brass with cutting-free and excellent properties was developed to substitute for Pb-brass.

研制了一种性能优异的易切削铋黄铜来替代有毒的铅黄铜。

youdao