来自刘川来的问题
Inmostfluidpowerhydraulicsystems,thespeedandforceofaloadarecontrolledusingvalvestothrottletheflowandcontrolthehydraulicpressureorreducetheflowrate.
Inmostfluidpowerhydraulicsystems,thespeedandforceofaloadarecontrolledusingvalvestothrottletheflowandcontrolthehydraulicpressureorreducetheflowrate.

