The top drive drilling system, divided into electrical top drive and hydraulic top drive.
顶部驱动钻井装置，分为电驱动顶驱和液压驱动顶驱。
This article studies the auto_position system of rock drilling arm.
就凿岩钻臂的自动定位系统进行了研究。
The sand control of oil well pump is very important for drilling-production system.
抽油泵防砂是钻采系统防砂的一个重要环节。
Welding and geo-drilling must be strictly implemented operation system, due to special guard over homework.
电焊、气焊要严格执行操作制度，明火作业应有专人看守；
Welding and geo-drilling must be strictly implemented operation system, due to special guard over homework.
电焊、气焊要严格执行操作制度，明火作业应有专人看守；
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