| http://www.w3.org/ns/prov#value | - Typical of suitable electrode materials which may be used are graphite; noble metals and their alloys, such as platinum, iridium, ruthenium dioxide, and the like, both as such and as deposits on a base metal such as titanium, tantalum, and the like; conductive compounds such as lead dioxide, manganese di oxide, and the like; metals, such as cobalt, nickel, copper, tu ngsten bronzes, and the like;
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