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The flexible lifting doors and industrial lifting doors developed by Ansheng Company are mainly used in large warehouses, painting workshops, small hangars and other occasions. The industrial lift door is composed of upper guide rail, upper guide wheel, lower guide wheel, main column, parallelogram hinge mechanism, PVC curtain surface, aluminum bead, handle and other components. The upper guide rail is made of standard I-steel, and the column is made of rectangular steel pipe. The door body is made of double-layer PVC fabric. The opening form of the door body of the industrial lift door is to pull the door leaf, move the column, and fold the curtain to realize the opening of the door leaf. Turn it off to reverse the operation. The sliding door leaf is closed in place with a lock,Position the door leaf. The door has the characteristics of safety and reliability, light opening, small footprint (no door library required), light weight, no ground rails, novel structure, wind pressure resistance, sound insulation, and heat preservation.