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8 1/2 Nti PDC Laum Ntsis M137 rau Hard Pob Zeb Drilling
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12 1/4 Nti API PDC Drill Bits Tuam Tshoj Hoobkas
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12 1/4 Nti M166 Matrix Lub Cev Polycrystalline Pob Zeb Diamond Drill Bits
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12 1/4 Inches Steel Lub Cev PDC Cov Khoom Rau Cov Roj Drilling
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12 1/4 nti M166 Maxtrix lub cev polycrystalline pob zeb diamond laum khoom
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12 1/4 Nti Matrix Lub Cev PDC Laum Khoom M196 Rau Roj Qhov Drilling
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API 12 1/4 nti API PDC laum khoom chaw tsim tshuaj paus hauv Tshuag
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7 hniav PDC drilling cov khoom M137 8.5 nti rau oilfield zoo
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API tus neeg muag khoom ntawm 6 baldes Matrix lub cev PDC pob zeb laum-6 "
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Matrix lub cev PDC pob zeb diamond laum me M137 5 7/8 nti (149mm)
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Roj zoo drilling Matrix lub cev PDC laum khoom nqi
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6 1/2 nti PDC kauj ruam rub me ntsis 3 Cov Hniav rau qhov tob tob drilling