英语词汇“churn drill”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	churn drill
释义	WordReference Random House Unabridged Dictionary of American English © 2024 churn′ drill′, Mining, Mechanical Engineeringa portable drill rig using a bit fashioned on a massive steel cylinder that is alternately lifted and dropped to drill a hole in earth and rock.
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