Pneumatic or hydraulic energy source .
气压或液压能量源。
Actuator: a device for converting hydraulic energy into mechanical energy.
执行元件：把液压能转换为机械能的各种装置。
Water hydraulic transmission is one of the most commonly used conversion method for ocean energy.
水液压传动是一种最常用的海洋能能量转换方式。
Variable speed hydraulic drive system is a new type energy saving system.
变转速液压驱动系统是一种新型的节能传动系统。
The new hydraulic system has the following characteristics:(1)saving energy;
新液压系统具有下列特点：（1）节省能源；
The new hydraulic system has the following characteristics:(1)saving energy;
新液压系统具有下列特点：（1）节省能源；
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