Nrog rau xyoo ntawm kev paub nyob rau hauv ntau lawm RO purification tshuab , mecanmed tuaj yeem muab tau cov sijhawm ro dej . dej muaj peev xwm muab tau raws sijhawm siv lub tshuab lim . Ntxiv rau cov khoom lag luam hauv qab no, koj tuaj yeem hloov kho koj tus kheej qhov chaw ro dej purification raws li koj cov kev xav tau tshwj xeeb.