About: http://webisa.webdatacommons.org/157805709

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	atmospheric, constant or cyclic hydrostatic pressure at predetermined periods and, optionally, a means capable of delivering and/or absorbing gases such as nitrogen, carbon dioxide and oxygen.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com