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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It is generally composed of power transmission system, walk device, job device, turn to brakes system, hydraulic system and control system.

它一般由动力传动系统、行走装置、工作装置、转向制动系统、液压系统和操纵系统组成。

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Which conditions can the hydraulic fluid shoulder to be able the normal work? In the hydraulic actuation system, the hydraulic fluid function is mainly effectively and stably the transmission power.

液压油必须负荷哪些条件才能正常工作？在液压传动系统中，液压油的作用主要是有效地和稳定地传动动力。

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