“crown block”的概念、定义、翻译、参考文献-科学参考

单词	crown block
释义	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	Trichiaceae Trichiales trichinosis trichite Trichiuridae trichloroacetic acid trichloroacetic aldehyde trichlorobenzene trichloroethanal trichloroethane trichloroethyl alcohol trichloroethylene trichlorofluoromethane trichloroiminocyanuric acid trichloroisocyanuric acid trichloromethane trichloromethyl chloroformate trichloronate trichloronitromethane trichlorophenol trichobezoar trichobothrium trichobranchiate gill Trichobranchidae trichocercous cercaria

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