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The oil distribution design is a key factor to the efficiency of the hydraulic motor with non-circular planetary gear.
非圆行星齿轮液压马达的配流设计是影响液压马达效率的关键环节。
Also the manufacturing precision of water hydraulic gear pump, especially gear surface and side flank, is required in order to improve its volume efficiency.
需要进一步提高水压齿轮泵加工精度，特别是侧板以及齿轮端面的平面度、表面粗糙度以提高水压齿轮泵的性能。
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