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API laum bts Hoobkas IADC126 4 3/4 nti (120mm)
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API Peb lub cones bits IADC126 4 5/8 nti (118mm) rau kev khawb qhov dej
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API cov khoom siv laum tshwj xeeb IADC126 5 1/4 nti (133mm) rau pob zeb tawv
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Tricone ntsis rau qhov dej drilling hauv Tshuag IADC126 6inches (152mm)
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API Tricone laum ntsis IADC126 9.5 nti (241 hli) rau kev muag khoom
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Lub ntsis rau qhov dej khawb IADC127 3 7/8″ nti (98.4mm)
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Chaw tsim khoom Tricone bits IADC127 4 9/16 nti (115.9mm)
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API tricone drilling IADC127 4 5/8 nti (118mm) rau kev muag khoom
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Tricone bits Hoobkas IADC127 5 7/8 nti (149mm) rau kev khawb qhov dej nyuaj
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Lub Hoobkas Kaw Cov Khoom IADC127 6 nti (152 hli)
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Cov ntsis tho qhov hauv Tshuag IADC127 7 7/8 nti (200mm)
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Cov khoom siv tricone luv nqi IADC127 9 5/8 "(244.5mm)