轮胎起重机行走部分变速箱的设计。
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.
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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