About: http://webisa.webdatacommons.org/148555066

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Metals such as iridium or a platinum-iridium alloy may be used for this purpose because of its high strength, stiffness, hardness and chemical inertness.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es