?8460.Which must be done before adjusting the relief valve of a main hydraulic system incorporating a pres- sure regulator?
发布于 2021-02-18 22:10:22
【单选题】 A ?Eliminate the action of the unloading valve. B ?Adjust ah other system relief valves which have a lower pressure setting. C ?Manually unseat all system check valves to allow unrestricted flow in both directions.
