| 摘要 |
PROBLEM TO BE SOLVED: To provide a crime prevention function for a bay window without obstructing natural lighting through the bay window by a simple structure. SOLUTION: In the window 2 provided onto an opening 4 of an external wall 1 of the building, an indoor opening 3 of the bay window 2 is communicated with the opening 4 of external wall 1, and a shutter 5 is provided to open and shut the indoor opening 3 of the bay window 2. COPYRIGHT: (C)2003,JPO
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