英语词汇pit props是什么意思，pit props的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典-电脑手机教程网

单词	pit props
释义	DEFINITIVE EXAMPLES 权威例句〔SUPPORT〕The pit props were placed only a foot or two apart, to support a mile of rock above them. 矿井里每隔一两英尺就有一根支柱，用来支撑上面一英里厚的岩石。朗文写作活用
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