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Fire doors are classified as Class A, Class B and Class C. Class A fireproof door is full steel plate, which can protect for 70 minutes. Class B fireproof door is made of all steel, which can protect for about 50 minutes. Part of Grade C fireproof doors are made of wood and can be protected for about 35 minutes.

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fire door price,fire door door closer,fire resistant door sliding-Puerta ZTFIRE: puerta cortafuego, puerta ignífuga, puerta resistente al fuego, puerta resistente al fuego, puerta de acero, puerta metálica, puerta de salida