Steel fire doors can be equipped with windows, louvers, ventilation louvers, etc. as required. Fire resistance is the biggest feature of steel fire doors, do not underestimate this kind of steel fire doors.

防火门厂，钢预悬外门,防火门1小时，金属空心门，fireproof door,exit door price,防火门锁，

防火金属门供应商，钢预悬外门，安装防火车库门，防火金属门框，防火门，金属前门，出口门价格，

紧急防火门，应急门材料，钢预悬外门，家用防火门，公寓防火门，防火门,防火门尺寸，出口门价格