| 摘要 |
<p>A rail, especially a wall rail (1) of iron or metal plate, is configured with a series of openings (2) which are produced by pressing back the plate material (3) between transverse section (4). Both the pressed-back parts (3) and the plate parts (5) which remain standing between the sections (4) are configured with arcuate or polygonal cross-section. The profiled areas extend over the whole breadth of the supporting side, and the material is formed approximately symmetrically out from the plane of the plate. The application also relates to a method for the production of the rail and a tool for use in the execution of the method.</p> |
