About: http://webisa.webdatacommons.org/178422367

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 piston-valve 1, leaflets 2 and internal cylinder 3 are all preferably fabricated from highly corrosion-resistant material such as titanium or carbon, and are coated with low-friction, wear-resistant, non-thrombogenic material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au