根据我国具体的生产实际情况，有必要建立我国自己的淬硬高速钢洛氏硬度和维氏硬度换算的标准。

According to real production case of our country, it is necessary to establish the standard about the conversion tables on hardness and strength of hardened high speed steel.

youdao

根据我国具体的生产实际情况，有必要建立我国自己的淬硬高速钢洛氏硬度和维氏硬度换算的标准。

According to real production case of our country, it is necessary to establish the standard about the conversion tables on hardness and strength of hardened high speed steel.

youdao