?8406.Extrusion of an O-ring seal is prevented in a high- pressure system by the use of a
发布于 2021-02-18 22:09:29
【单选题】 A ?backup ring on the side of the O-ring next to the pressure. B U-ring on the side of the O-ring away from the pressure. C backup ring on the side of the O-ring away from the pressure.
