英语词汇“firedamp-drainage drill”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	firedamp-drainage drill
释义	firedamp-drainage drill firedamp-drainage drill [′fīr‚damp ‚drān·ij ‚dril] (mining engineering) A heavy, compressed-air-operated, percussive, rotary or rotary-percussive drilling machine for putting up the boreholes in firedamp drainage.
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