来自刘川来的问题
Inmostfluidpowerhydraulicsystems,thespeedandforceofaloadarecontrolledusingvalvestothrottletheflowandcontrolthehydraulicpressureorreducetheflowrate.
Inmostfluidpowerhydraulicsystems,thespeedandforceofaloadarecontrolledusingvalvestothrottletheflowandcontrolthehydraulicpressureorreducetheflowrate.
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2020-09-23 02:03