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17 1/2inch milled teeth bit for soft rock /steel tooth bit/tricone bit2018-04-03 14:17:26 |
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roller cone cutters / tricone bit segment / tricone thirds for piling2018-04-03 11:02:51 |
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Water Well Drilling Tungsten Carbide Hard Rock 98mm Iadc637 TCI Roller2018-04-04 20:30:38 |