About: http://webisa.webdatacommons.org/6366739

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	In the conduit 65 there is a restriction 66 which creates a small pressure such as 2 or 3 psi upstream of the restriction when there is a flow signal, this pressure being used to actuate the visual warning device 29.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com