| http://www.w3.org/ns/prov#value | - The structured layer 2234 may be comprised of a cellulosic material such as cardboard or paper, polymer based films such as Mylar???, a polymer based foam, a foil film, semi-stiff nonwoven (for example, needle punched) materials, poly-coated nonwoven materials, corrugated board, and combinations thereof.
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