{HEAD ~ This spray} is then carried downstream over {TAIL ~ the outward radial portion} of the flameholder 50 adjacent the wall of the liner 6 
is carried downstream over
{ HEAD ~ This spray } is then carried downstream over { TAIL ~ the outward radial portion } of the flameholder 50 adjacent the wall of the liner 6
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH