The Rockwell and Brinell hardness of 16 metals were investigated. The effects of surface roughness on the hardness values were discussed.是什么意思_The Rockwell and Brinell hardness of 16 metals were investigated. The effects of surface roughness on the hardness values were discussed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句