About: http://webisa.webdatacommons.org/396706015

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 rings support a check valve, such as a ball and seat, although other types'of check valve members may be used, such as flaps or cusps.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com