英语词汇“self-acting door”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	self-acting door
释义	self-acting door self-acting door [′self ¦ak·tiŋ ′dȯr] (mining engineering) A ventilation door that is constructed of two halves which move on small pulleys and which are forced apart centrally as the trams come in contact with the converging beams that operate the door.
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