... . 7 DHCH Series Cartridge Filter Takes more impurities, Oil Filter 1. Application: Developed and Invented by East-Sea ... Make-up Water, Super-purified Water, Wasted Water, Underground Water.d. Carbon bed, Oil filter water.e. Edible Oil, Resin, Metal ... Cutting Liquid, Organic Solvents, Photo Chemistry, Plating Solution.f. RO Membrane ( Reverse Osmosis) , Super-Filtering Memebrane ...