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	prefigurations prefigurative prefiguratively prefigurativeness prefigure prefigured prefigurement prefigurements prefigures prefiguring prefii prefile pre-filing and technical guidance pre-filing and technical services prefilled prefilled syringe prefilter pre-filter oil pressure prefinance prefinanced prefinancing prefine prefinished prefinished door prefinite

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