| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the occurrence of fatigue failure of an O-ring groove and an accumulator. SOLUTION: This O-ring groove S is provided with an O-ring insertion port 20 formed in a supply and discharge cylinder 13; a side wall 21 continuous with the O-ring insertion port; and a bottom wall 23 continuous with the side wall through a corner wall 22. The internal wall surface of the corner wall 22 is formed in an inclined face inclined inward at 45 deg..</p> |
