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