英语词汇“prop-free front”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	prop-free front
释义	prop-free front prop-free front [′präp ‚frē ‚frənt] (mining engineering) In coal mining, longwall working in which support to the roof is given by roof beams cantilevered from behind the working face.
随便看	kudzag dzesov kudzag gabrelovich dzesov kudzu kudzu root kudzus kudzu vine kudzu vines kue kuea kuebler-ross, elisabeth kuec kueda kueh kuehne + nagel kuehneosauridae kuehneromyces mutabilis kuei kuei-chou kueichou kuei-lin kueilin kuei river kuei-yang kuenburg tamsweg kuenen, philip

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