{TAIL ~ The gas turbine engine} is comprised of a sealing ring supported within {HEAD ~ the housing} 
{ TAIL ~ The gas turbine engine } is comprised of a sealing ring supported within { HEAD ~ the housing }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD