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Terebrae integrae fabricae IADC127 6 1/4 unciarum (158.8 mm)
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Terebrae tricônicae praebitor IADC127 7.5 unciarum (190mm)
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Terebrae API IADC127 8 1/2 unciae (215 mm) ad saxum durum
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Terebrae triconicae in promptu IADC127 8 3/4 unciae (222mm)
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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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Terebrae ad obturacula cementi IADC127 4 3/4 unciarum (120mm)
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Terebra ad puteos perforandos IADC127 3 7/8″ unciae (98.4mm)
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Terebrae triconicae fabricator IADC127 4 9/16 unciarum (115.9mm)
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Foramen tricônum API IADC127 4 5/8 unciarum (118mm) venale
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Terebrae triconicae officinae IADC127 5 7/8 unciarum (149mm) ad puteos duros perforandos
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Terebrae obsignatae officinae IADC127 6 pollices (152mm)