不应使用牵引车代替钻机动力系统进行起放井架作业。
Do not use tractors to replace the rig power system for mast lifting and laying down.
钻柱将其扭转振动传至钻机动力头，引起动力头齿轮传动系统的非线性振动。
The BHA transmits its torsional vibration to the gear system of drill power pack and brings about nonlinear vibration.
自动变速箱是车装钻机动力传动及控制的关键组成部分，既要承担钻机起升系统和旋转系统的动力传递，也要用来驱动运载车行走。
Automatic transmission is an integral part of the truck-mounted drilling rig; it is responsible to trip for drilling and to drive the rig car.
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