... span. Hydranautics and DOW RO membranePurified drinking water treatment equipment is to produce high quanlity drinking water for drinking or ... of pure water is an indispensable process. The main structure: barrel body, baffles, manhole, gauge, filter head, filter, into the ... can automatically recoil, and so is red. The main structure: barrel body, baffles, manhole, gauge, filter head, filter, into the ...