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Fresae dentatae API in promptu IADC127 9.5 unciarum (241mm)
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Terebrae puteorum profundorum IADC127 13 5/8" (346mm) in promptu
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Coni volubiles, cuspides perforatrices, IADC216, 5 5/8 unciarum (143 mm)
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Terebrae cylindricae obsignatae IADC216 5 7/8 pollices (149 mm)
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Terebrae triconicae in promptu IADC216 6 3/4 unciae (171mm)
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Terebra rotatoria anethi IADC216 7 7/8 unciarum (200mm)
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Terebrae rotatoriae praebitor IADC216 10 5/8 unciarum (269mm)
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Eme terebras perforatorias IADC216 17.5″ (444.5mm)
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Tessellae triconicae IADC217 4.5 unciarum (114mm) ad puteos saxorum profundorum perforandos
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Terebra conica cylindrica sigillata API ad perforandum IADC217 5 7/8 unciarum (149.2mm)
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API terebrae praebitor IADC217 8 3/4 unciarum (222.2mm)
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cuspides terebrantes IADC217 17.5 pollices (444.5 mm)