UL 防火门

UL fireproof door=American standard fireproof door, the profiles are steel, wood, stainless steel, etc., and the fire resistance limit is 20 minutes to 180 minutes. UL fire doors must have a designated label, even for five accessories.

UL 防火门-ZTFIRE门-防火门,防火门,防火门,防火门,钢门,金属门,出口门