prov:value
| - As an alternative to the silver/silver chloride formulation, conductor 34 a may comprise conductive metal such as tin, silver, gold, copper, salts or oxides of these conductive metals, carbon, a substrate which has been coated with a conductive compound (e.g., polytetrafluoroethylene), an ink silkscreened on a carrier, metallized cloth, solid metal or carbon grid, foil, plate, etc.
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