About: http://webisa.webdatacommons.org/6389422

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	An extendable outer contact ring 230 a provides a circumferential surface for connecting to another rotating body, either directly by contact or indirectly through a chain or belt or other mechanism known in the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com