... fire retardant solution 防火液 fireproofing grade 防火等级 Firework lamp 烟花灯 ...
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Pass Fireproofing Grade Testing 通过防火等级试验
Contracting type deck series, it is close to the design of civilian construction, pass fireproofing grade testing.
缩口式楼承板系列，更贴近民用建筑的设计，通过防火等级试验。
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