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AS fire door and fire exit,fire exit alarm,emergency door lock
Steel fire door is a door frame, door leaf skeleton and door leaf panel made of steel materials. If the door leaf is filled with materials, it is filled with fireproof and heat-insulating materials that are harmless to human body. Steel fire doors can ensure that they are not easily damaged by impact deformation and external force, and can be used normally for a long time without replacement.
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