... 3M comp. 7 DHCH Series Cartridge Filter Takes more impurities, Oil Filter 1. Application: Developed and Invented by East-Sea Filter ... Liquid, Amine Liquid. b. Beer and Wine.c. Sea Water Purification, Water Treatment, 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 ...