discharging a fluid from the fluid assembly into the cavity and in contact with {TAIL ~ the body} in order to fill the cavity to a second position achieving the known volume wherein the inner layer is positioned away from {HEAD ~ the body} in the second position 
discharging a fluid from the fluid assembly into the cavity and in contact with { TAIL ~ the body } in order to fill the cavity to a second position achieving the known volume wherein the inner layer is positioned away from { HEAD ~ the body } in the second position
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH