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API tus neeg muab khoom ntawm cov pob zeb tob tob drilling bits IADC537 9 5/8 "(244.5mm)
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API TCI khawm ntsis IADC537 9 7/8″ (250mm) rau kev khawb av pob zeb tawv
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Lub Pob Khawm Tig IADC537 3 7/8″ (98mm)
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Cov ntsis laum Tricone IADC537 4 3/4″ (120.6mm)
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API tricone laum ntsis IADC537 14 3/4″ (374mm) rau pob zeb tawv
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Tricone Bits IADC537 4 5/8″ (118mm)
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API tricone pob zeb ntsis IADC537 5 1/4″ (133mm)
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API pob zeb laum ntsis IADC537 5 1/2” (139.7 hli) rau qhov dej tawv
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Cov ntsis laum API IADC537 5 5/8″ (142.9mm)
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Cov khoom siv tungsten carbide ceev ceev IADC537 5 7/8″ (149mm)
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Cov pob zeb tricone IADC537 6 nti (152.4 hli)
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Lub ntsis tricone tig IADC537 6 1/4 nti (159 hli)