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Seamless Oil Casing Pipe (API-5CT OCTG) (J55/K55/N80/L80/P110), Find Details and Price about Seamess Casing Pipes API Casing Pipe from Seamless Oil Casing Pipe (API-5CT OCTG) (J55/K55/N80/L80/P110) - Tianjin Tiangang Special Petroleum Pipe Manufacture Co., Ltd.