“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	systole systolic array Système International d'Unités syzygy szaibelyite szaskaite Szechtman cell Szilard-Chalmers effect szmikite szomolnokite sàrca Sörensen titration T t T0 space T1 space T2L T2 space T3 space T4 space Ta Tabanidae tabbyite tab-card cutter Taber ice

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