About: http://webisa.webdatacommons.org/118218197

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	Where the ring frames comprise a shape-memory alloy, such as Nitinol??? or the like, the spring force or otherwise similar ring frames can be varied by imposing different heat treatments.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com