| 摘要 |
<p>PURPOSE:To suppress cost-up with a simple structure, and also fix an oil chamber side spring certainly without increasing the axial direction size of a piston. CONSTITUTION:A piston 3 is arranged in a cylinder 2, and a cover 5 is fixed on the cylinder 2 through a plate 4 so as to form an oil chamber 10, and a retainer 6 to which an oil chamber side spring 7 is fixed is held and fixed between the cover 5 and the plate 4.</p> |
