PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Polyacrylamide and polyacrylate polymers and copolymers are used typically for high-temperature applications.Proppant material can be sand, intermediate strength ceramic proppants (available from Carbo Ceramics, Norton Proppants, etc.), sintered bauxites and other materials known to the industry.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com