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HSS Drill Bit Set 8PCS

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Insert Tricone Drill Bit

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TSP inserts for core drill bit of geological use and oil exploiting

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8 1/2 inch 215.9mm IADC 537 TCI tricone drill bit

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110mm 8090 DIAMOND CORE DRILL

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mach44,115mm dth bit with rocket shape face design

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This product has had certain related information (including production machinery

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