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TCI Tricone Bit
12 1/4 311.1MM IADC 537 Tricone Bit Rotary Speed For Well / Oilfield
Rubber Sealed Bearing TCI Tricone Bit High Rotary Speed 6 5/8"API Reg Pin
Hard Formation Oilfield Well Drill Bit 12 1/4" IADC 617 With High Compressive Strength
Sealed Bearing Tricone Roller Bit12 1/4" IADC 617 Oilfield Drill Bit
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