About: http://webisa.webdatacommons.org/183013802

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	Suitable gases such as nitrogen, air or carbon dioxide may be used, as well as mixtures of liquids and gases.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com