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Superior-Quality 8.2tons Used Iocking-Kelly Bars Js406-4*14.5m Drilling-Depth 55m for Rotary Drilling Rig, Find Details and Price about Piling Tool 4 Section Kelly Bar from Superior-Quality 8.2tons Used Iocking-Kelly Bars Js406-4*14.5m Drilling-Depth 55m for Rotary Drilling Rig - Xuzhou Jiuman Machinery Technology Co., Ltd.