About: http://webisa.webdatacommons.org/231554669

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	It is noted that the systems of FIGS. 4 to 6 can be factory calibrated using a laser interferometer or the like, a process which is especially easy with systems using coarse spacing or pitch.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com