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GB 51309-2018 第3.2.4条 Technical Standard for Fire Emergency Lighting and Evacuation Indication Systems

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GB 51309-2018 第3.2.4条

| **** | When system routes penetrate fire compartments, floor partition walls, floor slabs and movement joints, firestop sealing measures shall be provided at the penetration points, and the fire resistance rating of the sealing materials shall not be lower than that of the penetrated building elements. |

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