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Kubowola mutu IADC126 3 7/8 mainchesi (98.4mm) kwa thanthwe lolimba
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Othandizira a Milled Tooth Bits IADC126 mainchesi 4.5 (114mm)
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API kubowola bts fakitale IADC126 4 3/4 mainchesi (120mm)
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API ma cones atatu IADC126 4 5/8 mainchesi (118mm) pobowola bwino
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Tricone bits pobowola bwino mu stock IADC126 6inch (152mm)
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API Tricone kubowola pang'ono IADC126 9.5 mainchesi (241mm) zogulitsa
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Kubowola bwino fakitale IADC126 17 1/2 mainchesi (444.5mm)
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Tricone pang'ono fakitale IADC126 26 mainchesi (660mm)
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API makonda kubowola bits IADC126 5 1/4 mainchesi (133mm) kwa hard rock
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API bwino kubowola mutu IADC126 7 1/2 mainchesi (190.5mm)
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Zosindikizidwa zokhala ndi kubowola bts IADC126 9 7/8 mainchesi (250mm)
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Tricone kubowola bits ogulitsa IADC126 12 1/4 mainchesi (311mm) pobowola bwino