About: http://webisa.webdatacommons.org/21868780

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 principle of achieving the object produced by this invention is characterized in that a barrier is a separating or cover layer that can be penetrated by selective pitting by a chemical substance initially enclosed by the barrier.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com