| 摘要 |
<p>PCT No. PCT/CH86/00163 Sec. 371 Date Jul. 27, 1987 Sec. 102(e) Date Jul. 27, 1987 PCT Filed Nov. 25, 1986 PCT Pub. No. WO87/03346 PCT Pub. Date Jun. 4, 1987.Connecting elements (4) can be inserted into the ends of the individual bar-shaped elements (2), the connecting elements having a projection (13) which engages into an opening (8) at the end of the tube. In that way each individual connecting element (4) can be released even in a framework construction which has already been assembled. The bar-shaped elements (2) are exchangeable and the framework can be broken down into all individual parts.</p> |
