Solution Description: Electric shutter doors are multi-joint activities of the door in series together, starting by the motor group driven, rolling doors in the fixed slide to the top of the door as the center of the upper and lower rotation of the door. Applicable to commercial facades, garages, shopping malls, hospitals, factories and mines and other public places or residential. Especially the larger openings, inconvenience to install the ground door of the place to play a convenient, fast opening effect. Such as for garage doors, shopping malls fire shutter doors.