About: http://webisa.webdatacommons.org/21206988

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	This central recess may be mechanically formed by a process such as milling or may be formed by selectively laminating layers with pre-formed cutouts.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com