GB 50242-2002 第4.3.1条
3. Clauses 4.3.3 (fire hydrants) and 4.4.4 (sleeves) are key control points for hotel fire safety and waterproofing/moisture protection.
3. Clauses 4.3.3 (fire hydrants) and 4.4.4 (sleeves) are key control points for hotel fire safety and waterproofing/moisture protection.
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