About: http://webisa.webdatacommons.org/182102144

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	However, conventionally such tolerances are obtained by laboriously machining the geometry of the component parts out of a solid material, such as aluminum, steel, or other conductive metal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr