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5dp 5"/5 1/2"Oil Drill Pipe Nc38 Nc40 3 1/2" Thread Oil Drill Rod for Oil and Gas Well Oilfield, Find Details and Price about Oil Drill Rod Drill Rod for Oil and Gas Well Oilfield from 5dp 5"/5 1/2"Oil Drill Pipe Nc38 Nc40 3 1/2" Thread Oil Drill Rod for Oil and Gas Well Oilfield - Zhengzhou Jinghe Drilling Machinery Co., Ltd.