英语词汇“crown block”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	crown block
释义	crown block crown block [′krau̇n ‚bläk] (petroleum engineering) A wooden or steel beam joined to the tops of derrick posts of an oil well to support pulleys.
随便看	dnistro dnit dnix dni zarzadzania kapitalem ludzkim dnj dnj3 dnjak dnjb dnjc dnjepr dnjepropetrovsk dnjepropetrowsk dnjestr dnji dnk dnka dnkf dnkh dnkos dnl dnla dnla/i dnlb dnlc dnle

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