... membrane 3.Stainless steel RO drinking water device, RO filter1.Reverse osmosis water2.Dow, Hydranaustic ... ,beverage,biology and pharmacy,boiler,brewing,electronic,electric appliance,electroplate,leather,printing and dying,painting ... need to add any chemicals, stable pure water quality, and no pollution drained, low produce cost. ... simple, the applicability is strong High effciency water filter device