prov:value
| - .g., iron, nickel, cobalt; alloys containing the above metals and other metals e.g. zinc, antimony, aluminum lead, tin, bismuth, beryllium, manganese, selenium,tungsten, zirconium, vanadium; or mixture thereof; metal oxides such as iron oxide, titanium oxide, magnesium oxide, zinc oxide, aluminum oxide, thallium oxide, indium oxide, bismuth oxide, yttrium oxide, neodymium oxide, copper oxide, nick
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