6 1/2" IADC537 Tri-Cone Bit/Roller Cone Bit for Water Well Drilling
China 6 1/2" IADC537 Tri-Cone Bit/Roller Cone Bit for Water Well Drilling, Find details about China Tungsten Carbide Insert Bit, Rubber Sealed Journal Bearing from 6 1/2" IADC537 Tri-Cone Bit/Roller Cone Bit for Water Well Drilling