About: http://webisa.webdatacommons.org/423524555

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 back flow prevention arrangement for a fire suppression sprinkler system according to claim 31 wherein the shut off check valve indicates whether the valve is open or closed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es