More preferably, the diameter of {HEAD ~ the spray openings} of {TAIL ~ the gas supply nozzles} would increase the closer the spray opening is to the terminal end of the nozzle  
of
More preferably , the diameter of { HEAD ~ the spray openings } of { TAIL ~ the gas supply nozzles } would increase the closer the spray opening is to the terminal end of the nozzle
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH