The water purifier 3, further comprising moveable gates to control {HEAD ~ fluid flow} from into {TAIL ~ said body} of water 
from into
The water purifier 3 , further comprising moveable gates to control { HEAD ~ fluid flow } from into { TAIL ~ said body } of water
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH