英语词汇“pit prop”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	pit prop
释义	Word Frequency pit prop (pɪt prɒp) noun mining, British a wooden beam used to prop up the roof of a tunnel in a coal mine There was a vast demand for timber for pit props.
随便看	quad quad-band quad bike quadcopter quadded quadding quadplay quadplex quadr- quadr- quadragenarian Quadragesima Quadragesimal Quadragesima Sunday quadrangle quadrangular quadrangularly quadrans quadrant quadrantal Quadrantid quadraphonic quadraphonics quadraphony quadraplegic

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