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