... pollution prevention, particularly after the class is to prevent the reverse osmosis membrane, ion exchange resins, etc. free oxygen toxicity than pollution ... as organic matter, colloids, microorganisms, oil, residual chlorine restaurant, hotel, units, stations, terminals, industrial and mining enterprises and institutions, as a ... 0.6 0.75 MF-1200 1200 2600 1500 1200 5.5-11 0.6 0.75 MF-1400 1400 2800 ...