| 摘要 |
PROBLEM TO BE SOLVED: To provide a window allowing natural winds to be efficiently admitted indoors, and being usable as one having other functions such as preventing theft and the entrance of insects when wind is not required. SOLUTION: A multifunctional door 5 comprising a netted door or a latticed door is provided in a window opening 2 in a building 1 in such a manner as to be rotatable for opening and closing. The multifunctional door 5 is for admitting winds indoors when open, and is attached to, e.g. sashes.
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