About: http://webisa.webdatacommons.org/410351773

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	In this embodiment, the valve 1302 is a duckbill valve, one-way valve, or other sealing-type valve capable of opening to a large bore and yet closing around instrumentation such as the dilator shaft 1320.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk