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API vili nifo nifo IADC217 12 1/4 inisi (311mm) mo le vili lelei
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U'u vili tau maualalo IADC217 14 3/4 inisi (374mm) mo papa malo
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fa'ato'a si'i viliina IADC217 17.5 inisi (444.5mm)
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4 1/4 Inisi PDC Toso Bit 3 Lau
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API falegaosimea o TCI tricone bit IADC617 5 5/8″ (142.9mm)
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API rotary tricone bit IADC617 6 ”(152mm) mo le vili vaieli
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Tricone rock bit IADC617 8 1/2″ (215.9mm) mo le viliina lelei
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API faufale o tricone rock bit IADC617 9 7/8 inisi” (250mm)
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API falegaosi o tricone roller bit IADC617 12 1/4 inisi (311.1mm)
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API falegaosi mea eli maa IADC617 17 1/2 inisi (444.5mm) i totonu
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API tungsten carbide fa'aofi ma'a dill bit IADC627 3 7/8″ (98mm) i totonu
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u'a ta'avale vili IADC627 8 1/2″ (215mm/216mm)