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