绞车底板准备清洁和钻井螺栓孔。
Winch base plate ready for cleaning and drilling bolt holes.
特深井钻机的绞车由多台大功率电机通过并车后驱动，保证了钻井过程的功率需求；
The winch of extra deep shaft rig is driven by multiple high power motors that paralleled, which guarantees drilling's power requirement;
特深井钻机的绞车由多台大功率电机通过并车后驱动，保证了钻井过程的功率需求；
The winch of extra deep shaft rig is driven by multiple high power motors that paralleled, which guarantees drilling's power requirement;
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