| 摘要 |
The upper part (6) is provided with a recess (9) for the screw (7) head, in which recess screw spring (10) is fitted around the screw (7), which spring in the not fully applied position of the screw exerts sufficient force against the upper part to hold the pipe(2) fitted in the under part recess (5). At the same time, the spring allows a turning of the upper part around the screw to an extent which permits placing and removal of the pipe in the under part recess without the upper part requiring to be dismantled. |
