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API drill bits factory IDC216 4.5 inches (114mm)
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Roller cones bits olupese IAC216 5 5/8 inches (143mm)
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Awọn ohun rola ti o ni edidi IDC216 5 7/8inches (149mm)
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Milled ehin die-die IDC216 6.5 inches (165mm) fun daradara liluho
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Tricone die-die ninu iṣura IDC216 6 3/4 inches (171mm)
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API tricone liluho IDC216 7 5/8 inches (194mm) fun ohun elo epo
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Rotari dill bit IDC216 7 7/8 inches (200mm)
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Olupese awọn bit Rotari IDC216 10 5/8 inches (269mm)
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Ra awọn gige liluho IDC216 17.5″ (444.5mm)
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API tricone drill bits idiyele IAC216 4 5/8 inches (118mm)
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Awọn die-die tricone daradara jinna IDC216 6 inches (152mm)
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Awọn ohun elo liluho API IAC216 5 3/4 inches (146mm)