About: http://webisa.webdatacommons.org/308091883

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	The opposed coupling shoulders have a tendency to catch upon sharp edges and projections if a pipe string is run into wells or other elongate openings.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com