About: http://webisa.webdatacommons.org/11172564

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	A ratchet mechanism or other mechanism may be provided to selectively fix the lateral position of one or more of the retractor blades 214.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk