| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure exhibiting more sufficient reduction effect of impact sound. SOLUTION: A floor beam 2 is provided on the indoor side of a girth 1 to be adjacent to the girth 1, and a floor plate 4 is supported by the floor beam 2. Supporting of the floor plate 4 by the girth 1 is released or substantially released. COPYRIGHT: (C)2006,JPO&NCIPI
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