| http://www.w3.org/ns/prov#value | - Suitable materials include, for example, metal, such as, for example, magnesium, aluminum, steel (including stainless steel), and other metals; plastic; ceramic; polymers, such as polycarbonate, polyurethane, polyethylene, polyvinyl chloride, and other polymers and polymer blends; graphite fiber and graphite fiber composites; fiberglass; hybrid materials including metal fibers and plastic or polym
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