Particularly the fibrillating gas is a gaseous material such as {TAIL ~ air}, nitrogen, {HEAD ~ steam}, etc 
Particularly the fibrillating gas is a gaseous material such as { TAIL ~ air } , nitrogen , { HEAD ~ steam } , etc
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH