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In addition to the functions of ordinary doors, fire doors also have special functions of fire prevention, smoke separation, fire suppression and evacuation protection. The normally closed fire door is the most commonly used one. Its door leaf is always closed. When people pass, it is opened manually and closed automatically through the rear door leaf.

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مقاوم در برابر آتش، رنگ درب،fire rated door requirements between a garage and house,درب مقاوم در برابر آتش مالزی، درب فلزی