About: http://webisa.webdatacommons.org/24162056

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	Specifically, the reflecting surfaces of the two-reflector target 116 may be made to be physically identical in all respects and made of a material such as Invar??? so as to have negligible thermal expansion effects.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com