As well, moveable gates can be utilized to control the flow of {TAIL ~ metallic ions} into the body of {HEAD ~ water} 
As well , moveable gates can be utilized to control the flow of { TAIL ~ metallic ions } into the body of { HEAD ~ water }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD