Tricone Bit/Rock Drilling Bit/Roller Cone Bit 6 1/2 Inch IADC537
China Tricone Bit/Rock Drilling Bit/Roller Cone Bit 6 1/2 Inch IADC537, Find details about China Tungsten Carbide Insert Bit, Rubber Sealed Journal Bearing from Tricone Bit/Rock Drilling Bit/Roller Cone Bit 6 1/2 Inch IADC537