About: http://webisa.webdatacommons.org/56737741

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	Preferably, the substrate material is substantially free of impurities, such as carbon, when being machined by a laser.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es