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DTH Hammer Button Drill Bit Low Air Pressure with CIR90, CIR110, CIR150, CIR170, 110p, 130pshank,, Find Details and Price about Mining Bits DTH Drill Bit from DTH Hammer Button Drill Bit Low Air Pressure with CIR90, CIR110, CIR150, CIR170, 110p, 130pshank, - PUTIAN QIDELI ENGINEERING EQUIPMENT CO., LTD.