Infrared photo beam sensor and safety edge protection device for PVC high speed door
PVC high speed rolling shutter door has the characteristics of heat preservation, collision prevention, insect prevention, windproof, dustproof, sound insulation and so on. It can realize fast...
Electric shutter door purchase principle
Electric shutter door purchase principle: The rolling shutter door (also known as the rolling shutter) which is common in life is constructed by connecting the door panel as a multi-joint movable...