英语词汇“pillar drive”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	pillar drive
释义	pillar drive pillar drive [′pil·ər ‚drīv] (mining engineering) A wide irregular drift or entry, in firm dry ground, in which the roof is supported by pillars of the natural earth, or by artificial pillars of stone, no timber being used.
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