| 摘要 |
<p>The structure has rod extensions (42, 43) locked at a central retaining element (36) such that the rod extensions are pivoted in a rotatable direction about transverse axes. The rod extensions are attached at ends (1a, 4a) of rods, where the ends rest in a plane and are pivotally hinged around the transverse axes at the retaining element in a ring-shaped arrangement. The extensions are arranged at distance to each other. The rod extensions include curved attachment pieces (46a, 46b), which support the bent rod ends.</p> |
