钻机车的分动箱一轴后端的花键常被磨损或变形，无法实现动力的正常传递，因此必须进行维修。
In practice, the splines in rear of first axle of transfer case are often worn out or deformed, failing to finish the normal transmission of power, which should be maintenance.
钻机可根据用户要求选装三相交流发电机组，为施工现场夜间照明或焊接维修提供方便；
We can set up the spare electric engine and clutch implement according to client's requirement, so that the rig can work with diesel engine or electric engine.
旋挖钻机钻杆的销售、维修、服务；
The sales, maintenance and service of rotary drilling rig drill rod;
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