| 摘要 |
Elongate metal strip (11) having a plurality of substantially rectilinearly extending corrugations (23), the troughs (12) and/or crests (13) of the corrugations being deformed at predetermined points (24) spaced along their length, towards or beyond the median plane of the corrugations. There is also described elongate shaped section formed from such strip (11) and methods of manufacturing such strip (11). |
