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5 1/2 Six-tool Double-row-blade PDC Bit
5 1/2 Six-tool Double-row-blade PDC Bit

龙岩5 1/2 Six-tool Double-row-blade PDC Bit

5 1/2 Six-tool Double-row-blade PDC Bit

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龙岩Six-tool-blade PDC Bit

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龙岩8 1/2 Six-tool-blade PDC Coring Bit

龙岩8 1/2 Six-tool Double-row-blade PDC Bit

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