“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	stable range stable range condition stable range condition SR_k stable range condition SRk stable rank stable reduction stable reduction theorem stable region stable relation stable resonator stable root stable scale invariance stable scale-invariance stable scheme stable semigroup stable separatrix stable sequence stable set stable set polynomial Stable Shareholders stable sheaf stable singularity stable situation stable sliding stable smooth mapping

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