e) wherein said {TAIL ~ available energy consuming means} for pre mixing is shaped and dimensioned to consume less available energy than {HEAD ~ the available energy} consumed by said available energy consuming means for transferring 
e ) wherein said { TAIL ~ available energy consuming means } for pre mixing is shaped and dimensioned to consume less available energy than { HEAD ~ the available energy } consumed by said available energy consuming means for transferring
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH