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Friction Welding 76, 89, 102, 114mm Drill Pipe for Rock Blasting and Water Well Drilling, Find Details and Price about Friction Welding Drill Pipe 76 89 102 114mm Drill Pipe from Friction Welding 76, 89, 102, 114mm Drill Pipe for Rock Blasting and Water Well Drilling - Shijiazhuang Weilida Prospecting Machinery Co., Ltd.