T he function of filters in a hydraulic system is to maintain fluid cleanliness.
液压系统中过滤器作用是维持流体的清洁度。
2
An electric motor propels the bus, but its regenerative braking system also pressurizes hydraulicfluid.
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。
3
One company has presented an idea in which metal strips inserted in pavements and roads operate fly wheels by means of a piston action using hydraulicfluid.