providing a mixer in which {HEAD ~ the augers} can be rotated at different speeds without sacrificing {TAIL ~ mixing performance} 
rotated without sacrificing
providing a mixer in which { HEAD ~ the augers } can be rotated at different speeds without sacrificing { TAIL ~ mixing performance }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL