... parts: The pretreatment,the two-stage reverse osmosis (RO),Electrodeionization(EDI),Ultraviolet sterilization (UV),Polishing mixed bed(MB ... filter,Activated charcoal filter and Full automatic softener.The RO technique is mainly composed of the high-pressure ... water preparation and desalination. The RO technology is one kind of membrane separation filtration technology, using the pressure difference ...