一个电动发动机推动这辆公交车，但其再生制动系统也对液压流体加压。
An electric motor propels the bus, but its regenerative braking system also pressurizes hydraulic fluid.
液压系统中的液压油泵是为液压传动供给加压液体的一种液压元件，它是泵的一种。
The hydraulic system is pressurized hydraulic pump for a hydraulic fluid for the hydraulic drive device is supplied, it is a pump.
液压系统中的液压油泵是为液压传动供给加压液体的一种液压元件，它是泵的一种。
The hydraulic system is pressurized hydraulic pump for a hydraulic fluid for the hydraulic drive device is supplied, it is a pump.
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