In a burner which essentially comprises a swirl generator for a combustion air flow and means for injecting a fuel into the combustion air flow , {HEAD ~ a mixing section} is arranged downstream of {TAIL ~ the abovementioned swirl generator} 
is arranged downstream of
In a burner which essentially comprises a swirl generator for a combustion air flow and means for injecting a fuel into the combustion air flow , { HEAD ~ a mixing section } is arranged downstream of { TAIL ~ the abovementioned swirl generator }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL