| http://www.w3.org/ns/prov#value | - Cast resin-coated sand, graphite displacements or, in some instance, tungsten carbide particles in a flexible polymeric binder, may be employed to define internal watercourses and passages for delivery of drilling fluid to the bit face, cutting element sockets or pockets, ridges, lands, nozzle apertures, junk slots and other external topographic features of the matrix-type rotary drag bit.
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