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	zimphos zimran zimri zimrights zims zimt zimulti zin zinacef zinadol zinaida aleksandrovna volkonskaia zinaida ermoleva zinaida evgenevna serebriakova zinaida hippius zinaida krzhizhanovskaia-nevzorova zinaida nikolaevna hippius zinaida pavlovna krzhizhanovskaia-nevzorova zinaida pavlovna tulub zinaida serbryakova zinaida serebriakova zinaida serebryakova zinaida tulub zinaida udaltsova zinaida vissarionovna ermoleva zinaida vladimirovna udaltsova

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