Overhead DOOR is a commonly used facility for enterprises, suitable for commercial facades, etc. The common garage doors are mainly remote control, electric and manual. Among them, remote control, induction, electricity can be collectively referred to as an automatic garage door. The main difference between the manual car library door and the automatic Overhead Door is no motor. The automatic garage doors are mainly classified as: flap garage door and roller blind garage door. In particular, the door hole is large, and it is convenient to install the ground doors.