This source may include {HEAD ~ an airstream} entrained with particles which is discharged into the space through {TAIL ~ an orifice}; the airstream diverging as it enters the space 
is discharged through
This source may include { HEAD ~ an airstream } entrained with particles which is discharged into the space through { TAIL ~ an orifice } ; the airstream diverging as it enters the space
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH