| 摘要 |
Structural panels are assembled and set up to afford a knock-down shelter comprising a roof which spans opposed upright sidewalls. The roof and sidewall panels are detachably secured together by devices provided with interlocked parts respectively carried by the roof and sidewall panels. The interlocked parts automatically interlock while the panels are being assembled and set up to form the shelter and automatically disengage while the shelter is being knocked down.
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