About: http://webisa.webdatacommons.org/224167927

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 forward end 38 of the inner tube is shaped to produce a sharp pointed instrument capable of puncturing the abdominal wall, such instruments being known as trocars.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com