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

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.
随便看	days are numbered days are numbered, one's days are numbered, one's/his/its days away, restricted or transferred days before digital days before harvest/heading days before inoculation days before panicle emergence days before seeding days before transplanting days between dates days beyond terms days billing outstanding day scholars club day school day school leadership training institute day schools days delay enroute authorized as leave days delay enroute chargeable as leave days from planting days gone by daysheet dayshell days hence day shift

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