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Terebra triconica rotatoria API IADC617 6" (152mm) ad puteos perforandos
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Terebra tricônica saxorum IADC617 8 1/2″ (215.9mm) ad puteos perforandos
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Fabricator API terebrae triconicae saxorum IADC617 9 7/8 pollicum" (250mm)
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Officina API terebrarum cylindricarum triconicarum IADC617 12 1/4 unciarum (311.1mm)
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Officina API terebrarum saxorum IADC617 17 1/2 unciarum (444.5mm) in promptu.
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Terebra triconica TCI IADC617 6 1/2″ (165mm) ad machinam perforatricem
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Officina API terebrae triconicae TCI IADC617 5 5/8″ (142.9mm)