About: http://webisa.webdatacommons.org/435708434

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 check valve is a one way valve that allows almost unrestricted flow of fluid in one direction, but does not allow flow in the opposite direction.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com