英语词汇“rock 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	rock bolt
释义	WordReference Random House Unabridged Dictionary of American English © 2024 rock′ bolt′, [Mining, Civ. Engin.] Mining, Civil Engineeringa steel or fiberglass bolt inserted and anchored in a hole drilled in rock to prevent caving of the roof of a tunnel or subterranean chamber. 1955–60
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