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5 7/8 IADC 517 Tricone Tr Bit, TCI Drill Bit, Drilling Tools - China TCI Bit, Tricones

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5 7/8 IADC 517 Tricone Tr Bit, TCI Drill Bit, Drilling Tools - China TCI Bit, Tricones

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5 7/8 IADC 517 Tricone Tr Bit, TCI Drill Bit, Drilling Tools - China TCI Bit, Tricones

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