英语词汇“mining retreating”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	mining retreating
释义	mining retreating mining retreating [′mīn·iŋ rē′trēd·iŋ] (mining engineering) A process of mining by which the ore or coal is untouched until after all the gangways and such are driven, at which time the work of extraction begins at the boundary and progresses toward the shaft.
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