| 摘要 |
<p>The hydraulic operating piston (1,2) is manufactured by pressing, from a sheet steel blank. The finished piston is a cylinder with a dished end. The dished end being the head end of the piston. The skirt of the piston has an annular groove (3) in which is located the rim of a bellows garter (15). The groove is formed during the process of trimming the excess material from the skirt. The dished end can be either convex or concave and the piston can be fitted to new or existing calipers.</p> |
