| 摘要 |
PCT No. PCT/DK90/00258 Sec. 371 Date Apr. 8, 1992 Sec. 102(e) Date Apr. 8, 1992 PCT Filed Oct. 9, 1990 PCT Pub. No. WO91/04693 PCT Pub. Date Apr. 18, 1991.A wall rail of iron or metal material provided with a series of openings which are produced by pressing back the plate material between a transverse section. Both the pressback parts and the plate parts which remain standing between the transverse sections are configured with an arcuate or polygonal cross-section. The profiled areas extend over the entire breadth of the supporting side, and the material is formed approximately symmetrically out of the plane of the plate. |
