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12 1/4" iadc437/537 311.15mm rotary tricone rock

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12 1/4" IADC437/537 311.15mm Rotary Tricone Rock
12 1/4" IADC437/537 311.15mm Rotary Tricone Rock
12 1/4" IADC437/537 311.15mm Rotary Tricone Rock
12 1/4" IADC437/537 311.15mm Rotary Tricone Rock
12 1/4" IADC437/537 311.15mm Rotary Tricone Rock
12 1/4" IADC437/537 311.15mm Rotary Tricone Rock
12 1/4" IADC437/537 311.15mm Rotary Tricone Rock
12 1/4" IADC437/537 311.15mm Rotary Tricone Rock

12 1/4" IADC437/537 311.15mm Rotary Tricone Rock

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