... cosmetic, pharmaceutical, chemical industry, also suitable for manufacture potable wa reverse osmosis water treament advantage:1,the systerm occupy little space, easy to ... , is operation cost is also low. 3,finshed water under good electric conductivity ,one stage ≤ 10us/cm,two stage around 2 ... -3 us/cm,EDI ≤ 0.5us/cm (base on raw water ≤ ...