About: http://webisa.webdatacommons.org/41965387

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	As illustrated in FIG. 46, the inner surface(s) 32 of the collimator may have a generally curved shape, such as a parabolic, hyperbolic, elliptical or spherical shape.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr