About: http://webisa.webdatacommons.org/65910678

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 fluid is preferably a high-pressure gas, such as air or dry nitrogen gas that is delivered from a source that is in fluid communication with the piston bore.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr