Alternatively, the atomizer comprises {HEAD ~ two channels} respectively comprising a fluid emitting nozzle and {TAIL ~ a treatment emitting nozzle} 
comprising
Alternatively , the atomizer comprises { HEAD ~ two channels } respectively comprising a fluid emitting nozzle and { TAIL ~ a treatment emitting nozzle }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL