{HEAD ~ An edge coating} of {TAIL ~ polymer} or other material is disposed on and seals 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 
of
{ HEAD ~ An edge coating } of { TAIL ~ polymer } or other material is disposed on and seals 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
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