| 摘要 |
<p>The post has a post (1) having a standard tubular section or a section forming an internal rail. A sliding support (2) is arranged with the post for regulating height of a net (3). The support is provided with tightening unit (4) for tightening the net. A maintenance unit (5) is arranged for maintenance of the sliding support at a required height with regard to the post. The sliding support comprises a rolling unit (6) for enabling the support to be rolled against outside or against interior of the post.</p> |
