About: http://webisa.webdatacommons.org/451330476

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	In some preferred embodiments of the invention, at least some of the arc facets comprise a textured surface such as the grooves or bumps that would be formed by chemical etching or molding.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es