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