“mast/derrick”的概念、定义、翻译、参考文献-科学参考

单词	mast/derrick
释义	mast/derrick Encyclopedia 工学井架释 mast/derrick井架在钻井或修井过程中，用于放置天车，悬挂顶驱、游车、大钩等设备，存放钻杆、油管及抽油杆，以便进行起下钻具、钻进、下套管等作业的装置。
随便看	switchyard of hydropower station Switzerland Switzerland aviation Switzerland gotthard-basis tunnel swiveling swiveling chute swivel loom SWL swollen coil swollen tongue sword bean Sword Dance sword dance sword fern sword fern family sword fern genus swordfish Sword of Goujian, King of the Yue State Swordsman swordsman film Swords of Legends swords of Wu king and Yue king Sword Story swordtail swordtip squid

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