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