| 摘要 |
<p>An operating rod (43) is provided with a separating device (191) joined to its front dividing the chamber, containing a fluid, into two sections (21, 22). A helical spring (58) is inserted between the rear surface of the separating element (191) and a projection at the rear of the chamber keeping the element (191) under tension. The unit can be fitted with an additional piston (20), also attached to the rod (43) in order to separate the chamber into three sections (21, 22, 23).</p> |
