About: http://webisa.webdatacommons.org/278881395

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	If the safety valve or other well tool to be inserted in the bore 18 only requires a single control line, only one of the nipples 12 and 14 is needed and the other may be omitted.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com