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Oil Drilling Stabilizer/Drill Stabilizer O. D 311.1mm with API Spec 7-1 AISI 4145h, Find Details and Price about Drill Stabilizer Drilling Stabilizer from Oil Drilling Stabilizer/Drill Stabilizer O. D 311.1mm with API Spec 7-1 AISI 4145h - Hebei Shitan Machinery Manufacturing Co., Ltd.