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Atatu cones bits fakitale IADC217 3 7/8 mainchesi (98mm)
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Tricone bits IADC217 mainchesi 4.5 (114mm) pobowola chitsime chakuya
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API losindikizidwa chogudubuza chulucho pobowola IADC217 5 7/8 mainchesi (149.2mm)
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Zobowola mozungulira IADC217 6 mainchesi (152mm)
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API yopukutira dzino ma cones atatu IADC217 mainchesi 7.5 (190mm) ali mgulu
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API mafuta zitsulo mano bits IADC217 8.5 mainchesi (215mm) pobowola thanthwe
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API bits supplier IADC217 8 3/4 mainchesi (222.2mm)
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Zobowola zakuya IADC217 11 5/8 mainchesi (295.3mm) za thanthwe lolimba
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API Mill mano bits IADC217 12 1/4 mainchesi (311mm) pobowola bwino
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Kubowola mitengo yotsika IADC217 14 3/4 mainchesi (374mm) pamiyala yolimba
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yogulitsa pobowola zidutswa IADC217 17.5 mainchesi (444.5mm)