| 摘要 |
<p>Each of the profiles (1) is provided with two differently shaped longitudinal edges (11, 12) in order to be joined beside each other. A first edge (11) is bent in a right angle (11.1) from the straight central area (10), again towards the center (11.2) of the profile (1) and another time in a slightly acute angle (11.3) towards the vertical segment (11.1). The opposite edge (12) is bent also in a right angle (12.1) and a second time to the outside (12.2), downwards (12.3), and back (12.4) towards the center (10). Two complementary edges (11, 12) fit into one another and the inner edge (11) is held with a slight tension.</p> |
