?8400.What is the purpose of using backup rings with O-rings in hydraulic systems above 1,500 PSI?
发布于 2021-02-18 22:09:22
【单选题】 A ?Prevent internal and external leakage of all moving parts within a hydraulic system. B ?Provide a sea! between two parts of a unit which move in relation to each other. C ?Prevent high pressure from extruding the seal between the moving and stationary part.
