Its hardness is 63-65 HRC, its impact toughness is over 14J/cm2, its hardness balance on the roll surface is smaller than 2 HRC.是什么意思_Its hardness is 63-65 HRC, its impact toughness is over 14J/cm2, its hardness balance on the roll surface is smaller than 2 HRC.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句