- 12
- Jan
safety door olx,security doors visalia ca,safety door thc
Fire doors are divided into steel, wood, steel, wood and other materials. Among them, steel fire doors and wood fire doors are widely used. Steel fire door made of fire retardant materials with fire resistance stability, integrity and heat insulation door, mainly used for the building fire area of the firewall opening, stair entrance, shelter, pipe top, etc.
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