Industrial Aluminum Sectional Garage Door

Industrial Aluminum Sectional Garage Door  1. Excellent wind resistance: Steel sandwich door panel with good strength.   2. Excellent thermal insulation: Total thickness of door panel reaches 40mm   3. High-frequency operation: Torsion spring balance system counteracts most drag force during      opening.   4. Auto-Manual dual operation modes: When there is power failure or breakdown, the door can be  opened or closed by manual operation chain. Balance torsion spring system counteracts most of     drag-   force of opening. It can be opened by hand with a little force.   5. Various climbing modes: Climbing modes can be selected according to conditions of wall hole and available space1.Standard climbing mode  2. High climbing mode  3. Vertical climbing mode Garage Door  Specification: …