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API rotsputboarringsbits IADC537 10 5/8 inch (269 mm)
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API trije kegelboarring IADC537 11 5/8″ (295mm) foar hurde put
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Rotearjende tri-kegelboar IADC537 12 1/4″ (311mm)
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Metaal fersegele rotsboarbit út it Fiere Easten IADC537 13 5/8″ (346mm)
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Tricone rollerbitboarring IADC537 15.5″(393.7mm) foar djippe put
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TCI boarbit IADC537 16″ (406.4mm)
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Wolfraamkarbide ynfoegsel tricone bit IADC537 17.5″ (444.5mm)
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API & ISO tricone rollerbit IADC537 26″ (660.4mm)