英语词汇“hammer drill”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	hammer drill
释义	Word Frequency hammer drill noun 1. a rock drill operated by compressed air in which the boring bit is not attached to the reciprocating piston 2. an electric hand drill providing hammering in addition to rotating action
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