About: http://webisa.webdatacommons.org/103808809

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 addition, a construction where inert gas such as N2 or clean air is supplied for a positive pressure, exhausted, and deaerated for a vacuum may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr