顶部驱动钻井装置，分为电驱动顶驱和液压驱动顶驱。
The top drive drilling system, divided into electrical top drive and hydraulic top drive.
空气螺杆钻具是专为空气钻井而设计的动力装置。
The air screw drill tool was power equipment which was designed for air drilling.
空气螺杆钻具是专为空气钻井而设计的动力装置。
The air screw drill tool was power equipment which was designed for air drilling.
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