Determination of the hardness of the abrasive methods are more commonly used hand-cone method, mechanical cone method, Determination of Rockwell Hardness Tester and blasting method sclerometer.是什么意思_Determination of the hardness of the abrasive methods are more commonly used hand-cone method, mechanical cone method, Determination of Rockwell Hardness Tester and blasting method sclerometer.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句