In operation, the gas flows through the body 6 from {HEAD ~ the inlet end} 7 in {TAIL ~ an axisymmetric profile} 
in
In operation , the gas flows through the body 6 from { HEAD ~ the inlet end } 7 in { TAIL ~ an axisymmetric profile }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL