About: http://webisa.webdatacommons.org/281746748

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 de-focusing mask is a flat sheet fabricated from metal or other appropriate material, designed with a pattern of holes and/or slits or other shapes, which is placed between the laser light and the guide wire tip.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es