Fire doors are related to the safety of people's lives and property, but some lawless elements pretend to be ordinary doors in order to seek illegal benefits 。Fire doors are sold, causing huge safety hazards. Recently, a related case was prosecuted by ...

Fire doors are generally located on fire compartments, partitions or evacuation passages.All must have self-closing or sequential closing functions, and must be in case of fireIn the closed state. According to the opening and closing mode, it is usuall...