About: http://webisa.webdatacommons.org/437193449

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	A hydraulic fluid such as pressurized lubricating oil may be selectively applied to respective faces of a piston 56 supported for reciproacting movement within cylinder 58, and being coupled by way of shaft 54 to the slide valve 46.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com