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- Jan
fire timber door with 4.5″ hinge,en classs c fire proof steel door,60 minute rated fire doors
The surface of the steel fireproof door is treated by electrostatic spraying, and the vulnerable parts such as hinges, door locks, door closers are all high-quality hardware accessories. The switches are light and durable. Only Class A steel fire doors can meet UL standards.
https://ztfiredoor.com/20339.html
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