| 摘要 |
A plate-shaped material at least substantially made of a metal, characterised in that a corrugated (in cross-section) profile has been formed in the plane of the plate-shaped material, with the corrugations of said profile extending in meander-like fashion in the plane of the plate-shaped material, said corrugations in particular extending in zigzag or serpentine, preferably sinu-soidal fashion in the plane of the plate-shaped material. |
