PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • With regard to equipment characteristics, high temperature and high pressure work against each other in that regard. ???High pressures require the use of higher-strength steels for tubulars, casing, packers and other equipment.
http://www.w3.org/ns/prov#wasQuotedFrom
  • drillingcontractor.org