About: http://webisa.webdatacommons.org/288088353

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 valve member 18 is preferably formed from a metal, such as brass, but can also be formed from other durable materials, including, without limitation, nylons, Teflon or other metals or plastics.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com