About: http://webisa.webdatacommons.org/196231090

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 flap valve 215 may be formed from rubber or other suitable flexible material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com