{HEAD ~ An edge coating} of polymer or other material is disposed on and seals {TAIL ~ the interior edge} of the base sheet and may project beyond the facial planes of the base sheet to define protruding rims extending around the aperture 
is disposed on
{ HEAD ~ An edge coating } of polymer or other material is disposed on and seals { TAIL ~ the interior edge } of the base sheet and may project beyond the facial planes of the base sheet to define protruding rims extending around the aperture
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL OTH OTH 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