CIR Series Low Air Pressure DTH Drill Bits CIR65 CIR70 CIR80 CIR90 CIR110 CIR150 DTH drilling is a percussion system driving a piston inside hammer body with up and down motion by compressed air and ...View More
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CIR Series Low Air Pressure Mining Drill Bits CIR90 90mm With Cocave And Covex Face Type