PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This invention relates to an improvement in tools for handling well tubing, and well sucker rods, and the like; and more particularly to a tool of improved structural simplicity and facility for handling in connection with the work of coupling and uncoupling lengths of screwthreaded well tubing and sucker rods or other screwthread connected devices in the oil well business and the like.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com