| http://www.w3.org/ns/prov#value | - The one or more layers may comprise materials such as foil, metal foil, plastic foil, Mylar???, Kevlar???, metallized fabric, SpectraFabric??? antiballistic woven mesh fabric or similar robust yet lightweight thin skin or sheath housing, or others. [0165] In embodiments of the invention, the flexible cassette may contain an inner layer of a flexible metal, plastic, or metallized plastic material,
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