英语词汇“pillar-and-stall system”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-and-stall system
释义	pillar-and-stall system pillar-and-stall system [′pil·ər ən ′stȯl ‚sis·təm] (mining engineering) A system of working coal and other minerals where the first stage of excavation is accomplished with the roof sustained by coal or ore.
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