... , colloid and residual chloride through reasonable and high efficient pretreatment system; then remove tiny colloid, solvent, macromolecule etc through ultra-filtration ... device, but keeps ion in the water. This system is widely applied to drinkable water project, industrial pure water ... *20703100*920*22002620*920*16003620*1000*1800 All-in-one reverse osmosis pure water machine