About: http://webisa.webdatacommons.org/138221435

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 heaters 22, 24 may beresistance heating elements made of graphite or other suitable inert material.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com