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Wopereka API wa ma biti obowolera zitsime za miyala yozama IADC537 9 5/8″(244.5mm)
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Button bit ya API TCI IADC537 9 7/8″(250mm) yoboola zitsime zolimba za miyala
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Bulu Lozungulira IADC537 3 7/8″ (98mm)
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Ma Tricone drill bits IADC537 4 3/4″ (120.6mm)
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API tricone drill bit IADC537 14 3/4″ (374mm) ya hard rock
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Ma Tricone Bits IADC537 4 5/8″ (118mm)
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API tricone rock bit IADC537 5 1/4″ (133mm)
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Chobowolera miyala cha API IADC537 5 1/2” (139.7 mm) cha chitsime cholimba
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Ma biti obowolera a API IADC537 5 5/8″ (142.9mm)
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Ma biti obowola a tungsten carbide othamanga kwambiri IADC537 5 7/8″ (149mm)
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Ma tricone rock bits IADC537 mainchesi 6 (152.4 mm)
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Rotary tricone bit IADC537 mainchesi 6 1/4 (159 mm)