| 摘要 |
The unit consists of a piston (6) which can be axially adjusted in position and which is located in a recess (2a) of the table. A cap (9) is provided attached to the table for closing off the recess, whereby the piston and/or the cap form a chamber (11) into which the bolt can be placed and held. A clamping mechanism which is carried out by adjusting the piston enables the bolt to be held in place. The piston is held in a one-piece bush (3) in a displaceable manner with which it forms a pressurized chamber (5). |
