{TAIL ~ Zone V} comprises {HEAD ~ a set} of two axially spaced conventional sprayrings 72 and 74, sprayring 72 being located upstream of sprayring 74 
{ TAIL ~ Zone V } comprises { HEAD ~ a set } of two axially spaced conventional sprayrings 72 and 74 , sprayring 72 being located upstream of sprayring 74
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH