About: http://webisa.webdatacommons.org/411804621

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 method of claim 3 wherein said exhaust valve is a valve that may be mechanically held in position.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr