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Nc46 140mm Diameter 4.5m Length Water Well Drill Pipe DTH Drill Rof for Rock Drilling, Find Details and Price about Drill Rod Water Well Drill Pipe from Nc46 140mm Diameter 4.5m Length Water Well Drill Pipe DTH Drill Rof for Rock Drilling - Shijiazhuang Weilida Prospecting Machinery Co., Ltd.