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Zidutswa za mano a API mill zomwe zilipo IADC127 9.5 mainchesi (241mm)
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Zidutswa zobowola zitsime zozama IADC127 13 5/8 ” (346mm) zilipo
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Wopereka ma roller cones bits IADC216 mainchesi 5 5/8 (143mm)
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Ma biti ozungulira otsekedwa IADC216 5 7/8 mainchesi (149mm)
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Ma Tricone bits alipo IADC216 mainchesi 6 3/4 (171mm)
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Rotary dill bit IADC216 mainchesi 7 7/8 (200mm)
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Wopereka ma Rotary bits IADC216 mainchesi 10 5/8 (269mm)
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Gulani zinthu zobowolera IADC216 17.5″ (444.5mm)
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Ma tricone bits IADC217 mainchesi 4.5 (114mm) obowolera zitsime zakuya za miyala
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Chobowola chozungulira cha API chotsekedwa cha IADC217 mainchesi 5 7/8 (149.2mm)
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Wopereka ma bits a API IADC217 mainchesi 8 3/4 (222.2mm)
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zinthu zobowola zogulitsa IADC217 mainchesi 17.5 (444.5mm)