| 摘要 |
<p>The valve (10) has a drive unit (14), a piston (16) and housing (12), where the drive unit acts as guiding element for the piston. The drive unit has a gear (20) that is provided with an outer contour. The outer contour is aligned on an inner contour of a hollow space that is formed in the piston. An independent claim is also included for a rear holding device with an automatic controlling unit.</p> |
