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Versatile Spiral Drill Rods for Heavy Duty Drilling Applications, Custom Length From 120mm to 2000mm, Find Details and Price about Spiral Drill Rods Customizable Drill Rods from Versatile Spiral Drill Rods for Heavy Duty Drilling Applications, Custom Length From 120mm to 2000mm - Changchun Zhongcheng Hydraulic Machinery Equipment Co., Ltd.