About: http://webisa.webdatacommons.org/177588440

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	device 48, the same principles would apply if the valve device 48 were used above ground or at ground level, such as for example on the wellhead 22.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com