| 摘要 |
A pressure accumulator having a shell with the upper portion forming a dome having an axial gas opening, the shell having an axial oil port opposed to said gas opening, a holder in said shell supporting a bladder, a movable convex structure positioned in the shell between the holder and the gas opening, said convex structure having an annular ring elastic sealing material positioned on the exterior of said convex structure and adapted to engage the inner surface of said shell.
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