“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	short memory stationary process short memory time series short message communication Short message service short/micro film short multiplication Short Natural Treatises shortness shortness exponent shortnose chimaeras short-nosed fruit bat short-of-print book Short Parliament short paste short period short-period Cepheid short-period comet short-period perturbation short-period term short-period variable short plug drawing short pulse short QT syndrome short radius short-range alpha particle

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