| 摘要 |
A box is fitted together with a bottom of lateral walls, the latter being connected by mutually-engaging slots. The bottom has pins received in blind bores which engage in blind holes of the lateral walls. At least one of these pins is spring-biased to allow at least one lateral wall to be inserted. After the spring-biased pin jumps into the blind hold of this inserted wall, the pin and bore junctions are invisible and the system cannot be readily disassembled.
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