Further, it is possible to reduce the change frequency of chemical solution and decrease {HEAD ~ the amounts} of {TAIL ~ components} of chemical solution supplemented 
Further , it is possible to reduce the change frequency of chemical solution and decrease { HEAD ~ the amounts } of { TAIL ~ components } of chemical solution supplemented
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH