Water hydraulic drive system has some advantages of oil hydraulic transmission such as large power, high efficiency and compact structure as well as the unique advantage of environment-protection.

水压驱动系统既保持了油压传动传递动力大、效率高和元件体积小的优点，又兼有环保的积极作用。

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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。

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This paper not only discusses all kinds of the loading forms and system efficiency of the life test bed for hydraulic elements, such as oil pump, oil motor and oil crock.

本文对油泵、油马达、油缸寿命试验台的各种加载形式及系统效率进行了分析，并导出了各种加载形式系统效率的一般表达式。

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