About: http://webisa.webdatacommons.org/174657656

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	Valves - A K-valve, which comes on all aluminum tanks and low pressure steel tanks, do nothing other than release or stop the flow of air from the cylinder.
http://www.w3.org/ns/prov#wasQuotedFrom	scuba.com