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metal door 30 x 80,metal door 32 x 80,metal door 48 x 80
The steel fire door is made of galvanized steel, with an oxide protective layer and an anti-ultraviolet coating on the outside. The steel fire door material is sandwiched with a layer of “perlite board,” or other fireproof material, which can well isolate the fire and prevent the fire from spreading.
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