By heat treatment,center hardness (HRC) is 68,translation zone 62,cutter body 55 on the cross section of cutter tip.是什么意思_By heat treatment,center hardness (HRC) is 68,translation zone 62,cutter body 55 on the cross section of cutter tip.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句