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GB 50222-2017 第3.0.2条 Code for Fire Protection Design of Building Interior Decoration

Classification and grading of decoration materials消防工程

GB 50222-2017 第3.0.2条

| | Decorative materials are classified into four combustion performance grades: Grade A (non-combustible), Grade B1 (flame-retardant), Grade B2 (combustible), and Grade B3 (flammable). |

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