Tricone Bit, PDC Bit, Drilling Tools manufacturer / supplier in China, offering 14 3/4" Tricone Bit for Oil Drilling IADC 535 with Metal Sealed Bearing, 12 1/4"Tricone Bit for Oil Drilling IADC 637 with Metal Sealed Bearing, 8 1/2" Tricone Bit for Oil Drilling IADC 537 with Metal Sealed Bearing and so on.
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