| 摘要 |
<p>Four sections of angle profiles (3) are inserted vertically at the corners between four horizontally positioned box-profiles (2), their rear surfaces positioned against the front of the box profiles (2), in order to form a rectangular frame (1) with vertical extensions (3). A U-shaped holding element (4) is joined to each of the extensions (3) by inserting the outer ends of the elements (4) into slots (6) provided at the extensions (3). The hollow legs are pushed onto the extensions from below and are fixed with screws (5), guided through holes in the legs to a threaded area at the holding elements (4).</p> |
