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