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。

Contracting type deck series, it is close to the design of civilian construction, pass fireproofing grade testing.

youdao

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。

Contracting type deck series, it is close to the design of civilian construction, pass fireproofing grade testing.

youdao