The fluorocarbon vapor is more dense than {HEAD ~ the air} within {TAIL ~ the chamber} and is not miscible with that air 
The fluorocarbon vapor is more dense than { HEAD ~ the air } within { TAIL ~ the chamber } and is not miscible with that air
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH