| 摘要 |
<p>The coupling piece (7) has enlarged ends. The adjacent ends of the channels (1, 1'), have openings which are enlarged at their ends to receive the coupling piece on the inclined surface (6). The enlarged ends of the coupling piece pass beyond retaining elements (11, 12), which are welded in a V-shaped profile of the channels and the coupling piece is connected to them by bolts or screws.</p> |
