| 摘要 |
A multilayer body is provided to set up a plurality of walls, to form a plurality of sealed spaces, and to improve insulation and soundproof property. A multilayer body of sealed spaces comprises: a plurality of sealed spaces(13) which are formed inside the body(11); and a plurality of walls(12) forming a plurality of sealed spaces. The multilayer body is formed in the double layer. A plurality of walls are made of the paper wall of the plural layers. The paper wall of the plural layers is corrugated cardboard.
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