About: http://webisa.webdatacommons.org/401059208

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 apertures 22 are preferably of angular, Patented Feb. 8, 1966 particularly triangular, configuration, as shown.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es