About: http://webisa.webdatacommons.org/25048775

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	However, in the preferred case wherein the drilling fluid is a liquid, the pressure change due to gravity exceeds the drop due to friction; and AP is then a negative quantity.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com