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API Mill izinyo bits IADC217 12 1/4 intshi (311mm) yokomba umthombo
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Amasuntswana okomba aphantsi IADC217 14 3/4 intshi (374mm) kwilitye eliqinileyo
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amasuntswana okomba kwihoseyile IADC217 17.5 intshi (444.5mm)
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4 1/4 intshi PDC Tsala Bit 3 iiBlades
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Umzi-mveliso we-API we-TCI i-tricone bit IADC617 5 5/8″ (142.9mm)
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I-API ejikelezayo i-tricone bit IADC617 6 ” (152mm) yokomba umthombo
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Tricone rock bit IADC617 8 1/2″ (215.9mm) yokomba umthombo
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API umenzi wetricone rock bit IADC617 9 7/8 intshi” (250mm)
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I-API yomzi-mveliso we-tricone roller bit IADC617 12 1/4 intshi (311.1mm)
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Umzi mveliso we-API wokomba wamatye IADC617 17 1/2 intshi (444.5mm) kwisitokhwe
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I-API tungsten carbide ifake i-rock dill bit IADC627 3 7/8″ (98mm) kwisitokhwe
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I-Rotary roller bit IADC627 8 1/2″ (215mm/216mm)