按GB8624- 1997《建筑材料燃烧性能分级方法》，本产品为b1级难燃材料，确保安全可靠。
According to GB8624-1997 "building materials combustion performance of grading method", this product is the B1 level flame retardant materials to ensure safe and reliable.
按GB8624- 1997《建筑材料燃烧性能分级方法》，本产品为b1级难燃材料，确保安全可靠。
According to GB8624-1997 "building materials combustion performance of grading method", this product is the B1 level flame retardant materials to ensure safe and reliable.
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