| 摘要 |
<p>The element has a rear gripping section (22) connected with a construction unit (32) by a connection section. An opening (35) is provided with an internal thread for a rod element section. A clamping surface (23) of the rear gripping section includes an insertion section (24) and a clamping section (25), where the insertion section and the clamping section include angles (alpha, Beta) with a layer that is mounted in the construction unit, and one of the angle is larger than another angle.</p> |
