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API laum khoom Hoobkas IADC216 4.5 nti (114mm)
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IADC216 5 5/8 nti (143mm)
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IADC216 5 7/8inches (149mm)
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Milled hniav khoom IADC216 6.5 nti (165mm) rau qhov zoo drilling
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Tricone khoom hauv Tshuag IADC216 6 3/4 nti (171mm)
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API Tricone Drilling IADC216 7 5/8 nti (194mm) rau roj rig
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Rotary dill ntsis IADC216 7 7/8 nti (200mm)
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Teb cov khoom siv IADC216 10 5/8 nti (269mm)
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Yuav cov khoom drilling IADC216 17.5 "(444.5mm)
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API Tricone laum khoom nqe IADC216 4 5/8 nti (118mm)
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Sib sib zog nqus tricone khoom IADC216 6 nti (152mm)
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API Drilling Rig khoom IADC216 5 3/4 nti (146mm)