The system also has {HEAD ~ an automatic mode} in which {TAIL ~ blower speeds} are selected from a pre programmed table 
The system also has { HEAD ~ an automatic mode } in which { TAIL ~ blower speeds } are selected from a pre programmed table
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH