More preferably, the air pressure is regulated at about 90 psi at {TAIL ~ the service station} 14 to operate {HEAD ~ the dispenser system} 
More preferably , the air pressure is regulated at about 90 psi at { TAIL ~ the service station } 14 to operate { HEAD ~ the dispenser system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD