| http://www.w3.org/ns/prov#value | - Other preform elements comprised of cast resin-coated sand, or in some instances tungsten carbide particles in a flexible polymeric binder, may also be employed to define internal watercourses and passages for delivery of drilling fluid to the bit face, as well as cutting element sockets, ridges, lands, nozzle displacements, junk slots and other external topographic features of the bit.
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