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

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	bronchogenic abscess bronchogenic adenocarcinoma bronchogenic cancer bronchogenic carcinoma bronchogenic cyst bronchogenic tumors bronchogram bronchography broncho-grippol-dm bronchointerstitial pneumonia broncholith broncholithiasis bronchology bronchomalacia bronchomediastinal (lymphatic) trunk bronchomediastinal lymphatic trunk bronchomoniliasis bronchomotor bronchomotor tone bronchomucotropic bronchomycosis broncho-oesophagology broncho-oesophagoscopy bronchopancreatic bronchopathy

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