第07840 章防火阻絕1. 通則1.1 本章概要本章說明貫穿防火區劃或結構體之防火阻絕材料

第07840 章防火阻絕1. 通則1.1 本章概要本章說明貫穿防火區劃或結構體之防火阻絕材料

41 Pages · 2017 · 514 KB · Chinese
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“ Don't ruin a good today by thinking about a bad yesterday. Let it go. ” ― Anonymous
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