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	khirbet qumran khirdalan khirghistan khirghiz khirghizia khirghizstan khirgis depression khirgis-nur khirgistan khirgizia khirgizstan khirgystan khirgyzia khirgyzstan khirkah khis khisaria khishrau khislavichi khist khitan khitan dynasty khitan empire khitan liao khitan people

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。