About: http://webisa.webdatacommons.org/454789280

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	Disposed within the pinching means is a resilient tubular envelope 28, which in a preferred embodiment comprises a tube formed of polyvinyl chloride, silicone rubber, or other resilient material having a non-thrombogenic surface.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com