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I-Tricone roller bit IADC637 4 3/4″ (120mm) yokubhoboza amatshe aqinile
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I-Ball tooth tricone biit IADC637 5.5″ (140mm)
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Ifektri ye-API ye-TCI tricone biit IADC637 6 “(152.4mm) isikhona esitokweni
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I-API TCI tricone rock bit IADC637 6 3/4″ (171.4mm)
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Intengo yebhithi ye-API Tricone IADC637 8 1/2” (215.9mm)
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I-Rotary button drill bit IADC617 12 1/4 amayintshi (311mm)
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Umkhiqizi wamabhithi okubhola e-API i-tricone drill IADC637 12 1/4” (311.1mm)
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Ibhithi lokubhoboza elivalwe ngensimbi i-IADC637 14 3/4” (374.6mm) lomthombo ojulile
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Ama-cones amathathu i-IADC637 17 1/2” (444.5mm)
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Umhlinzeki wama-Tricone bits IADC637 6.5 inches (165mm) we-hard rock
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Amabhithi e-roller ajikelezayo i-IADC637 9 7/8” (250.8mm)
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Ifektri ye-API ye-Roller cone bit IADC637 3 7/8″ (98mm) isitokwe