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Customizedl zoo drilling khoom IADC127 14 3/4 "(374mm)
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Lag luam wholesale tricone khoom IADC127 17.5 nti (444.5mm)
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Cement plug drilling khoom IADC127 4 3/4 nti (120mm)
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Ntsis rau qhov zoo drilling IADC127 3 7/8 "inches (98.4mm)
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API Tricone Drilling IADC127 4 5/8 nti (118mm) kev muag khoom
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Ntim cov khoom Hoobkas IADC127 6 nti (152mm)
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IADC127 12 1/4 "(311mm)