| http://www.w3.org/ns/prov#value | - Examples of metals and alloys include stainless steel (e.g., 316L, BioDur??? 108 (UNS S29108), 304L stainless steel); alloys including stainless steel and from five percent by weight to 60 percent by weight of one or more radiopaque elements such as platinum, iridium, gold, and/or tungsten (e.g., platinum enhanced radiopaque stainless steel (PERSS???) alloys), such as the alloys described in Craig
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