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API fakitale ya Roller chulucho pang'ono IADC637 3 7/8″ (98mm) mu katundu
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Batani bits ogulitsa IADC637 7 7/8 ” (200mm)
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API tricone rock bits IADC637 9 5/8 ” (244.5mm) zili mgulu
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TCI tricone pang'ono IADC617 6 1/2 ″ (165mm) pobowola
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Wopereka API wobowola miyala yakuya IADC537 9 5/8″(244.5mm)
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API TCI batani pang'ono IADC537 9 7/8″ (250mm) pobowola mwala wolimba
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Katundu Wozungulira Batani IADC537 3 7/8″ (98mm)
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Ma Tricone Bits IADC537 4 5/8″ (118mm)
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Kubowola kwa Tricone IADC537 4 3/4″ (120.6mm)
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API trione rock bit IADC537 5 1/4″ (133mm)
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API rock kubowola pang'ono IADC537 5 1/2 ” (139.7 mm) kwa molimba bwino
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API kubowola bits IADC537 5 5/8″ (142.9mm)