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Pretium terebrae API Tricone IADC637 8 1/2” (215.9mm)
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Terebra rotatoria cum globulo IADC617 12 1/4 unciarum (311 mm)
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Terebrae triconicae API fabricatae IADC637 12 1/4" (311.1mm)
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Terebra metallica obsignata IADC637 14 3/4" (374.6mm) ad puteum profundum
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Terebra trium conorum IADC637 17 1/2” (444.5mm)
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Terebrae Polycrystallinae Adamantinae API 8 1/2 Pollices
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12 1/4 pollices API PDC terebrae officina Sinensis
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Terebrae adamantinae polycrystallinae M166 Maxtrix, 12 1/4 unciarum
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API 12 1/4 pollices API PDC terebrarum fabricator in promptu
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API praebitor 6 baldium Matrix body PDC terebrarum saxorum - 6″
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Pretium terebrarum PDC corporis matricis perforationis puteorum olei
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API 5 5/8 unciarum PDC Drag Bit 3 Laminae ad formationem duram