45-55hrc Tungsten Carbide Tricone Roller Cone Drill Bits For Core Barrel

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45-55hrc Tungsten Carbide Tricone Roller Cone Drill Bits For Core Barrel

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45-55hrc Tungsten Carbide Tricone Roller Cone Drill Bits For Core Barrel

45-55hrc Tungsten Carbide Tricone Roller Cone Drill Bits For Core Barrel Applicable layers: dense sand, gravel, hard rocks and very hard formation, etc.. Sizes: From 2 7/8 to 26"larger sizes for hole ...

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45hrc tricone roller cone drill bits

55hrc tricone roller cone drill bits

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