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GB 51309-2018 第3.2.5条 Technical Standard for Fire Emergency Lighting and Evacuation Indication Systems

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GB 51309-2018 第3.2.5条

| **** | Junction boxes and splitter boxes at the ends of system circuits (such as emergency lighting luminaires and evacuation indicator signs) shall be made of metal materials and provided with fire protection measures (such as filling with fire-stop putty). |

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