From these cases is determined a case of {TAIL ~ amounts} supplemented in which {HEAD ~ the treating ability} of chemical solution is maintained at a required level and the amounts supplemented are minimized 
From these cases is determined a case of { TAIL ~ amounts } supplemented in which { HEAD ~ the treating ability } of chemical solution is maintained at a required level and the amounts supplemented are minimized
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH