英语词汇“boulder buster”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	boulder buster
释义	boulder buster boulder buster [′bōl·dər ‚bəs·tər] (engineering) A heavy, pyramidal- or conical-point steel tool which may be attached to the bottom end of a string of drill rods and used to break, by impact, a boulder encountered in a borehole. Also known as boulder cracker.
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