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3 Three Four Blades Wings Step Drag Bits , Deep Rock Well Drilling Bits2019-08-14 15:20:16 |
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Chevron Step Drag Bit Carbide Blade Drag Bit 2 3/8"~6 5/8" API reg pin2019-08-14 15:20:16 |
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3 1/2'' API REG 190mm 3 Wings Step Drag Bits For Coal Mining2020-12-15 11:45:25 |
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6 5/8'' API REG 3 4 Wing TC Step Drag Bits For Water Well Drilling2021-04-16 18:25:57 |
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76mm 89mm 114mm 3 4 Wing Step Drag Bits For Soft Drilling2021-04-16 18:21:18 |
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Tungsten Carbide 254mm Step Drag Bits With For Water Well Drilling2020-12-15 11:51:23 |
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SGS API REG Thread Tungsten Carbide Step Drag Bits With 3 4 Wings2021-04-16 18:23:14 |