英语词汇“headway per drill bit”的中英文释义、用法、翻译及短语词组-英汉翻译词典

单词	headway per drill bit
释义	headway per drill bit 英?[?hed?we? p?: dril bit] 美?[?h?d?we p? dr?l b?t] 释义 [经] （每一）钻头进尺
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