| 摘要 |
<p>The element (1) has retainers (7) for double-profile-shaped rigid coupling elements (3), where the retainers are spaced from each other along a horizontal symmetry axis of lower and upper bearing surfaces (2). The retainers comprise locking units that are arranged in an area of ends of transverse beams (5) of the retainers. Longitudinal beams of the retainers are connected with the transverse beams. The ends of the transverse beams are arranged along a transverse direction in lateral edge areas of the bearing surfaces on two ends of the retainers.</p> |
