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Thread Pin Diameter 254mm Three Wing Bit Drag Bits For Water Well Drilling
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High Speed SC32 - COP Down The Hole Hammer For Mining And Quarry Drilling
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171mm 4 Wings Chveron Drag Bits With 3 1/2'' API REG Pin
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305mm Chevron Step Drag Bits For Clay Sand Drilling
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Soft Formation Soil Drilling Blue 305mm Diameter 3 Wings/Blades Drag Bit
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