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High Clearness Speed ISO9001 PDC Drag Bit2022-12-08 15:20:28 |
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Anti Erosive Toughness Pdc 325mm Concave Drill Bit2021-04-07 09:44:54 |
Golden 178mm DHD360 Button Bits Rock Drilling2021-04-07 09:44:54 |
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Geothermy 13mm 5 1/4 Inches Water Well Drill Bits2021-04-07 09:44:54 |