About: http://webisa.webdatacommons.org/124256749

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	FIG. 20a is a plan view of a substrate obtainable by making a negative copy of the substrate of FIG. 19 and machining groove side surfaces in upper portions of such negative copy;
http://www.w3.org/ns/prov#wasQuotedFrom	google.es