About: http://webisa.webdatacommons.org/305631856

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 commercially-available valves discussed heretofore (i.e. the Pneutronics, Inc., valves) have been found to be particularly useful for this purpose.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com