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Is the fireproof door frame not sealed with the property pipe? Is it safe?
Tube, not safe. The fire door frame is not sealed and belongs to property management. If it is not sealed, the door frame will not be explained, and the broken glass will be dangerous. Fire door refers to the door that can meet the requirements of fire stability, integrity and heat insulation in a certain period of time. It is a fire zone with a certain fire resistance limit, located in fire zones, evacuation staircases, shafts and so on.
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