About: http://webisa.webdatacommons.org/192804821

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	The shape of the final surface of the projection optical system is not limited to an oval, and the final surface can have various shapes, such as a rectangle, an arc, and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es