About: http://webisa.webdatacommons.org/140413755

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, residual, non-condensing gases such as air are not purged from the system, but remains in the system so that when the device is not operating, the internal pressure remains, near to, or substantially at ambient pressure.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com