直流电动机工作电源装置的液压系统中的工程机械，主要是配合液压泵。
DC motors work as power device of the hydraulic system in the project machinery, mainly matched with hydraulic pump.
液压站是由液压泵、驱动用电动机、油箱、溢流阀等构成的液压源装置或包括控制阀在内的液压装置。
Hydraulic station is driven by hydraulic pump, motor, oil tank, the overflow valve is composed of hydraulic source equipment or including control valves, hydraulic equipment.
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