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