About: http://webisa.webdatacommons.org/368412114

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 poppet firing valve piston 136 may be formed of various materials, such as aluminum, other metals, plastics, or other rigid materials, as contemplated by those of skill in the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca