英语词汇“long-pillar work”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	long-pillar work
释义	long-pillar work long-pillar work [′lȯŋ ¦pil·ər ‚wərk] (mining engineering) A coal-winning technique used in underground mining in which large pillars of coal are left as the face is advanced; finally all the pillars are removed together.
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