China 12 1/4' (311.1mm) IADC637G Tricone Drill Bit ...
Tricone Drill Bit, Rock Bit, Drilling Bit manufacturer supplier in China, offering 12 1/4' (311.1mm) IADC637G Tricone Drill Bit, Tricone Rock Bit, TCI Tricone Bit, 8 1/2' 215.9mm IADC637 Tricone Roller Cone Bit Single Cone Bit for HDD Piling, 8 1/2' IADC637 Rotary Drilling Single Roller Cone Bit, Tricone Cutter Bit for Core Barrel and so on.
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