About: http://webisa.webdatacommons.org/262843702

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	The mandrel may be made of a refractory material such as glass, alumina or zirconia (for heat-treating devices made of purely metallic components) or may be made of a metallic material (e.g., stainless steel).
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr