| 摘要 |
<p>A sheet assembly includes a flat portion (2) having a predetermined width and a predetermined length, a flexible portion (3) integrally combined with one edge (2a) of the flat portion (2) and having two opposite curved edges (3c,3d) orienting inwardly thereof, and two curved ribs (4,5) are integrally combined with the two opposite curved edges (3c,3d) of the flexible portion (3), respectively, and project outwardly from the flexible portion (3). A connecting flap (6) is integrally combined with another edge (2b) of the flat portion (2), and when erected, the sheet assembly has the flexible portion curved, the ribs bent, and the flap attached to the curved flexible portion (3). <IMAGE> <IMAGE></p> |
