英语词汇“roof bolt”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	roof bolt
释义	roof bolt roof bolt [′rüf ‚bōlt] (mining engineering) One of the long steel bolts driven into walls or roofs of underground excavations to strengthen the pinning of rock strata.
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