About: http://webisa.webdatacommons.org/34132179

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	During normal operating or storage conditions, a weight or other method of loading typically forces a cover against a seal to prevent fluid under pressure in the storage tank or equipment from escaping through the relief device.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com