| 摘要 |
PROBLEM TO BE SOLVED: To facilitate a building block having good prefabricability and releasability. SOLUTION: An additional cabinet 2 is mounted on a base cabinet 1. The cabinet 1 has a bottom plate 10 having pawls 107 and 108, an L-shaped side plate 16 clamped to the plate 10 via screws, having slits 162 and 163 for inserting the pawls 107 and 108 and covering a left side face and a back surface, a side face post plate 15 clamped at the plate 10 and the plate 16 via screws, and a beam 18 clamped at the left side face of the plate 16 and the plate 15 via screws. The cabinet 2 has bottom holding member 33 having holes 331 and 332 for screws, an additional L-shaped side plate 37 clamped at the member 33 via screws and having a pawl 372, an additional side face post plate 30 clamped at the member 33 via screws, coupled to the plate 37 via screws and having a pawl 30I and holes 30K, 30L, and an additional beam 32 coupled to the upper end of the additional side face post plate and the upper end of the side face of the additional L-shape side plate via screws.
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