| 摘要 |
<p>The part (1) has horizontal rods provided at inner sides of side walls (6, 7) of covering wings (4, 5) and extending up to edges (18) of the side walls, where the edges are turned towards the adjacent covering wings. Pins and/or elongate holes are arranged at and/or in the rods such that the pins and/or elongate holes stand perpendicular or approximately perpendicular over the edges. The edges are adapted to each other in its profile such that the edges are rolled on each other around the blocked pins about an angle range in a constant system without a gap.</p> |
