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Hiele boarbits fabryk IADC127 6 1/4 inch (158.8mm)
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Leveransier fan Tricone-bits IADC127 7,5 inch (190 mm)
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API-rigboarbits IADC127 8 1/2 inch (215 mm) foar hurde rots
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Tricone-bits op foarried IADC127 8 3/4 inch (222 mm)
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API freesbits op foarried IADC127 9,5 inch (241 mm)
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Djippe putboarringsbits IADC127 13 5/8” (346mm) op foarried
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Sementpluggboarbits IADC127 4 3/4 inch (120 mm)
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Bit foar it boarjen fan in put IADC127 3 7/8″ inch (98.4mm)
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Tricone bits fabrikant IADC127 4 9/16 inch (115.9mm)
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API tricone boarjen IADC127 4 5/8 inch (118mm) te keap
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Tricone bits fabryk IADC127 5 7/8 inch (149mm) foar hurde putboarring
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Fersegele bits fabryk IADC127 6 inch (152mm)