英语词汇“underhole”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	underhole
释义	underhole underhole [′ən·dər‚hōl] (mining engineering) To mine out a portion of the bottom of a seam, by pick or powder, thus leaving the top unsupported and ready to be blown down by shots, broken down by wedges, or mined with a pick or bar.
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