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Terebrae API ad puteos saxorum perforandos IADC537 10 5/8 unciae (269 mm)
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Terebra API trium conorum IADC537 11 5/8″ (295mm) ad puteum durum
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Terebra triconica rotans IADC537 12 1/4″ (311mm)
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Terebra perforatoria saxorum Extremi Orientis obsignata metallica IADC537 13 5/8″ (346mm)
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Terebra cylindrica triconica IADC537 15.5″ (393.7mm) ad puteos profundos perforandos
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Terebra TCI IADC537 16″ (406.4mm)
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Terebra triconica e carburo tungsteni IADC537 17.5″ (444.5mm)
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Terebra cylindrica triconica API et ISO IADC537 26″ (660.4mm)