The surface area of contact between the first and the second layers can define a frame about {HEAD ~ the perimeter} of {TAIL ~ the reservoir} 
of
The surface area of contact between the first and the second layers can define a frame about { HEAD ~ the perimeter } of { TAIL ~ the reservoir }
OTH OTH 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