About: http://webisa.webdatacommons.org/334830606

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	Other keying means known to persons skilled in the art may be used.In an alternate mode, the valve including the body, the ramps and the ball, is mounted in the cannula of the tracheotomy tube.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com