About: http://webisa.webdatacommons.org/132557272

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	While carbon graphite was mentioned as material, other materials, such as ceramics or refratories may serve for some of those parts mentioned.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr