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 noun : a timber or steel pulley support connecting at the top the derrick posts of an oil well
随便看	ugrian ugric ugric ugrist ugro ugro- ugrug ugsome ugt UH uh UHF uh-huh uhlan UI ui ui uighur uighurian uighuric uigur uigurian uiguric uilleann uilleann pipe

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