pass fireproofing grade testing
Contracting type deck series, it is close to the design of civilian construction, pass fireproofing grade testing
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pass fireproofing grade testing
通过防火等级测试
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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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