| 摘要 |
The end part of a drop pipe extend has a hook which engages with an eccentric on the other end part of the pipe extent. Thus, by rotation of the eccentric, the pipe extent is tensioned around the pipe itself. The eccentric comprises a plate with a circular raised part, the side of which has an S-shaped cross-section. It is located in the end part by snap-engagement in a circular hole. |
