| http://www.w3.org/ns/prov#value | - The electrical conductivity-imparting filler may, for example, be a powder of metal such as copper, nickel or silver; a fiber of metal such as iron or stainless steel; carbon black, or a metal inorganic compound having the surface of e.g. zinc oxide, glass beads or titanium oxide coated by metal sputtering or electroless plating.
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