measuring air pressure in the air cup, the air pressure being directly related to {HEAD ~ the density} of {TAIL ~ the insulation} 
of
measuring air pressure in the air cup , the air pressure being directly related to { HEAD ~ the density } of { TAIL ~ the insulation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL