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GB 50370-2005 第3.2.2条 Code for Design of Gas Fire Extinguishing Systems

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GB 50370-2005 第3.2.2条

| **** | **Design concentration**: The design concentration of a heptafluoropropane fire suppression system shall not be less than 1.3 times the extinguishing concentration and shall not be lower than 8% (typical values: 9%–10%). |

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