英语词汇“rockwell hardness”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	rockwell hardness
释义	rock·well hardness \ˈräˌkwel-, -_kwəl-\ noun Usage: usually capitalized R Etymology: after Stanley P. Rockwell, 20th century American metallurgist : the hardness of a metal or alloy measured by an apparatus in which a diamond-pointed cone is pressed into the metal to a standard depth to determine the relative resistance to penetration as indicated automatically by a number on a dial
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