| 摘要 |
A panel having a pair of longitudinally extending side edges, spaced apart end edges located between said side edges, and first and second substantially planar side surfaces located between said side and end edges. Strengthening means is located along and extending away from the one side surface. Snap locking engagement means extends away from the one side surface and is located adjacent said end edges. The engagement means in use is operable to secure said panel to a structure. |
