Hard Rock Roller Cone Drill Bits Designed for extreme compressive strength formations, hard rock roller cone bits employ interlinked tungsten carbide inserts (TCI) with reinforced tip geometries to ...더 보기
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Tricone Cone Drill Bit Hard Rock Diamond API 5 7/8" 6" 6 1/2" 6 3/4" 149-171mm Tricone Drill Bits