本文提出了一种研制无添加剂光亮淬火油的新方法。

A new method is introduced in this paper on bright quenching oil without additives.

youdao

本文提出了一种研制无添加剂光亮淬火油的新方法。

A new method is introduced in this paper on bright quenching oil without additives.

youdao