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DTH Drill Bit for Rock Drilling / Blast Drilling CD35 / DHD3.5 / IR3.5 / Br3 /M30 / Cop32 /Ql30, Find Details and Price about DTH Bit Drilling Bits from DTH Drill Bit for Rock Drilling / Blast Drilling CD35 / DHD3.5 / IR3.5 / Br3 /M30 / Cop32 /Ql30 - Changsha Chaojingang Machinery Manufacturing Co., Ltd.