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TCI tricone pob zeb IADC537 6 3/4 "(171mm)
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API khawm ntsis IADC537 6.5 nti (165 hli) nrog tus nqi luv nqi
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TCI pob zeb ntsis IADC537 7 1/2” (190 hli)
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API Hoobkas tricone ntsis IADC537 7 5/8 ”(193.7 hli)
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TCI tricone ntsis IADC537 7 7/8 nti (200 hli)
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Tungsten Carbide Ntxig Ntsis IADC537 8 1/2″(215.9mm)
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API khawm pob zeb laum ntsis IADC537 8 3/4″ (222.2mm) nrog tus nqi luv nqi
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TCI laum ntsis IADC537 9 1/2″(241mm) rau cov roj av tawv
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API pob zeb qhov dej drilling bits IADC537 10 5/8 nti (269mm)
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API peb lub khob hliav qab IADC537 11 5/8″ (295mm) rau qhov dej tawv
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Tig tri-cone ntsis IADC537 12 1/4″(311mm)
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Hlau kaw Far Eastern pob zeb drilling ntsis IADC537 13 5/8″ (346mm)