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Description:1. Strap tension pulley module Strap is hanged on strap tension pulley module to adjust its tension degree. 2. Strap module By the way of strap module, transfer the running of electric machine into reciprocate of opening and close drove by hanger. Adopt dentiform synchro belt with low retractility and high transferring effect. 3. Guideway module Being composed of new-style aluminum product is easy to cut off. And it is able to adjust installation lively according to different width. 4. Hanger module Hang the door in the guideway by this module. There are wear-proof wheels which can slip on the guideway. Single door's weight can reach 150kg. 5. Controller module This module, which is applicable for power supply of 220V/50Hz, receives human testing signals from sensor, drive electric machines to test the module, and control door's opening and close. 6. Electric machine module This module adopt DC non-brush dynamo of small bulk, large powder and long life. After decelerating of high-effect and low-yawp worm wheel pole, it drives the synchro belt to make door open and close automatically and frequently. It can also consecutively run safely.