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API feme ea Roller cone bit IADC637 3 7/8″ (98mm) setokong
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Mofani oa thepa ea likonopo IADC637 7 7/8 ” (200mm)
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API tricone rock bits IADC637 9 5/8 ” (244.5mm) setokong
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TCI tricone bit IADC617 6 1/2 ″ (165mm) bakeng sa mochini oa ho cheka
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API mofani oa thepa ea likotoana tsa ho cheka seliba se tebileng sa majoe IADC537 9 5/8″(244.5mm)
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API TCI konopo hanyane IADC537 9 7/8″(250mm) bakeng sa ho cheka seliba sa majoe a thata
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Rotary Button Bit IADC537 3 7/8″ (98mm)
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Tricone Bits IADC537 4 5/8″ (118mm)
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Likotoana tsa ho cheka tsa Tricone IADC537 4 3/4″ (120.6mm)
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API trione rock bit IADC537 5 1/4″ (133mm)
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API rock drill bit IADC537 5 1/2 ” (139.7 mm) bakeng sa seliba se thata
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API drill bits IADC537 5 5/8″ (142.9mm)