| 摘要 |
<p>The collapsible case has two opposite sidewalls with transverse locking devices engaging with the two opposite walls. The four walls are held upright by other devices provided on base and cover. The base (1) and the cover can have peripheral flanges (1a) facing towards each other, and four sidewalls (3-6) whose vertical edges are bent into a U-shape. Two opposite walls have vertical guides (7-10) into which the edges of the other two slide. The walls without the guides can have their edges bearing against the outside of the other two to hold them in place. The width of the walls with guides can be such as to allow them to fit closely inside base and cover.</p> |
