prov:value
| - ; a thermoset plastic, for example, epoxy, polyester, polyurethane, phenolic, and alkyd; an elastomer, for example, silicone (polyorganosiloxane), (poly)urethane, isoprene rubber, and neoprene; an organic or inorganic crystal; alone or combined with an electrically conducting filler, such as a ceramic, metal, for example but not limited to, nickel, silver, silver and aluminum, aluminum, and copper
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