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.
随便看	disappearing into the woodwork disappearing into thin air disappearingly disappearing off the face of the earth disappearing stair disappearing target disappearing twin disappear into the woodwork disappear into thin air disappear off the face of the earth disappears disappears from disappears into the woodwork disappears into thin air disappears off the face of the earth disappear/vanish off the face of the earth disappear without (a) trace disappear without a trace disappear without trace disappendency disappendent disapplication disapplications disapplied disapplies

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