About: http://webisa.webdatacommons.org/38030919

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 retraction means could be fibers that extend back from the expansion springs 18, a sheath that covers the springs and holds them down until expansion, or other means which will be obvious to those skilled in the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com