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Automatic wire take up is to use multiple take up winches, add up to 4 concentric contacts, store and release the energy of surface scroll spring, and one-way locking of the ratchet wheel.

When the power line is pulled out, the surface scroll spring stores energy. When the pull-out is stopped, the rotating shaft rotates under the action of the scroll spring until it is locked by the ratchet, and the power line stops acting; When taking up the wire, use the button or other pipes to open the lock to release the energy storage of the flat scroll spring and drive the rotating shaft to wind and retract the power wire.

https://www.chinacabletec.com/

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