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Korea 9 7/8 tricone bit for mining,iadc825
Korea 26inch steel tooth bit iadc115
Korea 12.25 IADC317 steel tooth tricone bit
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Korea 15 inch IADC837 TCI tricone bit
Korea 15 inch IADC617 TCI tricone bit
Korea 15 inch IADC537 TCI tricone bit
Korea 14 3/4 inch IADC617 TCI tricone bit
