About: http://webisa.webdatacommons.org/157111636

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	A light-shielding section 55 is formed on one surface of the parallel flat plate 54 by vapor-depositing a metal such as Cr (chromium) onto the entire surface except for a central portion.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com