| 摘要 |
<p>Two rows (15,17) of reinforcing ribs (19,21) run longitudinally along a groove (1) on the top of a container wall (3). A row of intermediate ribs (11) with springy characteristics runs in-between the reinforcing rib rows. The intermediate rib row also forms curved boundaries (12) extended into one of the reinforcing rib rows. A row of zigzag ribs (25) runs outside and adjacent to one of the reinforcing rib rows.</p> |
