| 摘要 |
A flat or annularly configured grid structure comprising non-planar or waved strips which are formed to include generally V-shaped portions. Adjacent ones of the generally V-shaped portions have their pointed apexes on opposite sides of the central plane of the strip, and the apexes have sections substantially enlarged longitudinally of the strip for increasing the strength of the strip and facilitating connection of the strip to laterally adjacent structure, such as by welding. |
