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