EDI brings revolutionary  progress on water treatment technology. 
                      Usually there is sodium, calcium,  magnesium, chloride, nitrate and salt in water. Through RO treatment, 95%-99% oboe  mentioned ion can be wiped.
                      And extra-pure water is  usually used in microelectronics industry, semiconductor industry, power  generation industry, pharmacy industry and laboratory. It also can be used as aqua  destillata in pharmaceutical production, food and drink used water, chemical  industrial water and so on.