About: http://webisa.webdatacommons.org/421983928

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	In the present embodiment, the concave curved surface is a portion of an inner side surface of a cylinder extending along the Y-direction.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com