| 摘要 |
<p>The structure is assembled from U-shaped uprights (1) with a base (1a) and two lateral sides (1b). Regularly spaced holes (1e) are in the angles (1d) between the base and the sides. Brackets (3) have hooks (3a) at their ends that engage in the holes. The holes have an upper part (1e1) and a narrower lower part (1e2). The curved hooks, at the top and bottom of the bracket, engage in the top part of the hole. Notches (3b), at the level of the hooks, cooperate with the lower part of the hole. The hooks are on two vertical surfaces (3c,3d) and these are joined by horizontal (3e) and inclined surfaces (3f).</p> |
