... )2.Pre-treatment +double stage reverse osmosis system+EDI(electric conductivity≥15MΩ.CM)3.Pre-treatment +double stage reverse osmosis system +air film+EDI+ ... water,water storage easy to pollution; 4.Adopted import reverse osmosis membranes,desalination rater is high ,long service life,the ... operation cost is low,water storage easy to pollution; 5.On-line water quality monitoring and control,real-time ...