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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)
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Tricone roller bit drilling IADC537 15.5″ (393.7mm) rau qhov dej tob
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TCI lub laum ntsis IADC537 16″(406.4mm)
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Tungsten Carbide Ntxig tricone ntsis IADC537 17.5″ (444.5mm)
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API & ISO tricone menyuam ntsis IADC537 26″ (660.4mm)