China 45R32 Normal Flat Face Top Hammer Drill Bit ...
Thread Drilling Bits R32-45mm,general flat face button bits.Parabolic botton are suitable for medium abrasive and hard fromations.Good penetration rates and resistance to steel wash. Perfect designs,tungsten carbide and skirt steel, QIDELI provides leading strength and penetration rates for more productivity,excellent straightness and hole ...
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