... hydraulic pump gear；液压油泵齿轮 hydraulic pump gear box；液压油泵齿轮箱[壳体] hydraulic pump group；液压泵组件 ...
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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。
In the two kinds of the tubular pump sets, the gear box transmission scheme is much better in hydraulic performance.
而这两种贯流泵装置，又以齿轮箱传动方案的水力性能为优。
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