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Ma bits obowola zitsime za miyala a API IADC537 mainchesi 10 5/8 (269mm)
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API ma cones atatu bit IADC537 11 5/8″(295mm) ya chitsime cholimba
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Chozungulira cha tri-cone bit IADC537 12 1/4″(311mm)
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Chitsulo chobowolera miyala cha Far Eastern chotsekedwa ndi chitsulo IADC537 13 5/8″(346mm)
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Kuboola kwa tricone roller bit IADC537 15.5″(393.7mm) kwa chitsime chakuya
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TCI drilling bit IADC537 16″(406.4mm)
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Tungsten Carbide Insert tricone bit IADC537 17.5″ (444.5mm)
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API & ISO tricone roller bit IADC537 26″(660.4mm)