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94mm Coal Mining Drill Bits Directional 4 Blade PDC Bit For Well Drilling

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94mm Coal Mining Drill Bits Directional 4 Blade PDC Bit For Well Drilling

94mm Coal Mining Drill Bits Directional 4 Blade PDC Bit For Well Drilling

94mm Directional Drill Bit Coal Mine Bit 5 Blades PDC Mining Bit Characteristics: 1. The Directional Drill Bit crown is a flat polished surface for hard, non-abrasive formations. it can be used for ...

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