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