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第2篇 建築の防火 第3章 建築の分類と耐火等級2

2016-11-04View Original

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2、第一種高層民用建築の床の耐火限界は()時間以上でなければならない。A 1 B 1.5 C 2.5 D 3 答え:B
Reply #22016-12-12
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