About: http://webisa.webdatacommons.org/392699174

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	Although a variety of rotary valves may be used, one example is a valve rotated by a geared down motor shaft which aligns a particular set of ports, 150 or 152, with the working fluid hydraulic network 108 as the valve is rotated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es