About: http://webisa.webdatacommons.org/100739508

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 preferred embodiment is a blowout disc and a ball operated flapper check valve held open by a ported tube.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com