Tricone Bit, PDC Bit, Hole Opener manufacturer / supplier in China, offering 15 1/2 Inches IADC 127 Steel Tooth Bit, 12 1/4 Inches 311mm IADC 127 Steel Tooth Tricone Drilling Bit, 8 1/2 Inches IADC 227 Tricone Bit Steel Tooth Drill Bit and so on.
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