Control system 170 is set up by an operator through {HEAD ~ the use} of {TAIL ~ interface terminal} 176 
Control system 170 is set up by an operator through { HEAD ~ the use } of { TAIL ~ interface terminal } 176
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH