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Such system adopts sand filtration,active carbon filtration as the pre-filtration, which can remove the suspended materials, sands,organic colloid,orgnism, odour,remaining chlorine and so on.Then use the RO system to remove most of the dissolubility materials,bacterial,then use the ozone system to keep fresh.Such system has automatic operation and semi-automatic operation available.Automatic has adopted relay to finalize the automatic operation. http://www.waterfillingline.com/
