英语词汇“track instrument”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	track instrument
释义	track instrument noun : a treadle device on a railroad track depressed by a passing train to operate an alarm (as near a crossing)
随便看	compo compone componee componency component component componental componential componentry compony componé componée comport comportable comportance comportment compos compos compose composed composed composedly composedness composed throughout composer

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