The overall design for the hydraulic top drive, discussed how to choice the motor, pump, and the design and layout of the gear box, the brake energy recovery and so on.

对液压顶驱进行了总体设计，讨论了马达、泵等的选择，减速箱的设计方案与布局，刹车制动能量回收等。

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The distributing pump test bench for hydraulic disc brake is controlled and tested by means of computer.

液压盘式制动器分配泵试验台是应用计算机控制技术来实现控制与检测的。

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Failures which can be solved by minor adjustment on brake pump, wheel, steering hydraulic cylinder, and micro-valve, connect level, mast roller, steering axle, etc. are excluded.

像总泵、车轮、转向液压缸、微动阀、连杆、门架滚轮、转向桥等部位，只要靠紧固进行调整就能修理的故障。

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