About: http://webisa.webdatacommons.org/39831918

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	Generally conical thus includes spherical surfaces, oval surfaces, stepped surfaces and other surface shapes which generally taper inwardly and provide the desired registration and drive functions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk