Fire doors are divided into steel fire doors, wood fire doors, steel wood fire doors and fire doors made of other materials. From the perspective of fundamental fire resistance, steel fire doors are better than other products of the same type in terms of their own structures and internal fillers. Wooden fire doors are definitely not as fire resistant as steel ones.

ZHTdoors 防火扉、防火扉および Windows での 31 年の生産経験。 主な UL 防火扉、EN 防火扉、BS EN 防火扉など。私たちは認定を受けています。ZHTdoors は OEM と無料のデザインをサポートしています。私たちの利点: 良質、工場価格、優れたサービス。