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API 5CT OCTG9-5/8 Casing Tubing N80 L80 Petroleum Pipe with Btc Coupling, Find Details and Price about OCTG Casing Tubing N80 L80 Petroleum Pipe from API 5CT OCTG9-5/8 Casing Tubing N80 L80 Petroleum Pipe with Btc Coupling - Tianjin Dongfanglong Petroleum Equipment Manufacture Co., Ltd.