| 摘要 |
<p>The board has a base (10) including a set of support columns (12) extending from a lower surface of a support plate (11). An upper plate (20) is mounted on an upper part of the base, and provided with two reception cavities (22). Two reinforcement ribs (30) are received in the reception cavities. A set of hooks (13) extends from the upper surface of the support plate along long sides of the support plate. The upper plate includes hook channels (21) arranged in the long sides of the upper plate. The hooks of the base are attached with the hook channels.</p> |
