Lead can improve the cutting performance; brass this easy cutting brass used as watch &clock parts.

铅能改善黄铜的切削性能﹔这种易切削黄铜常用作钟表零件。

youdao

Lead can improve the cutting performance; brass this easy cutting brass used as watch &clock parts.

铅能改善黄铜的切削性能﹔这种易切削黄铜常用作钟表零件。

youdao