| 摘要 |
A T-shaped metal strip (10,11) is fastened to the end of the first board (30) by screws. The upright portion of the T-shape fits into a groove in the end of the board, and there are enlarged portions of the T-shape accommodating the screws. The two hooks (12) face the same way, and fit into apertures (21) in a metal insert (20) in the second board (40). |
