| 摘要 |
A flexible, extruded plastic wall structure (2) with a hollow core is presented . The wall structure has an overall flat back wall (2), an overall front wall (40) and at least one support wall (28) extending between and confined to the interior surfaces of the overall back wall and the overall front wall; the overall back wall, the overall front wall and the at least one support wall having a generally uniform thickness and defining at least two defined spaces. The wall structure includes sections, where the rear wall of each section is flat from the bottom of the wall structure to the top of the wall structure. The hollow wall structure has a front wall having vertically disposed sections with different contours. Structure is provided in at least one of the sections for withstanding impact blows to the wall structure. |
