The amount of {HEAD ~ matter} in {TAIL ~ a certain state} of phase can however be so small in a borderline case the the cooling system of the device operates in practice with matter in one phase only, e.g. liquid phase 
The amount of { HEAD ~ matter } in { TAIL ~ a certain state } of phase can however be so small in a borderline case the the cooling system of the device operates in practice with matter in one phase only , e.g. liquid phase
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH