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API 5L Psl1 Psl2 A106 A53 Gr. B A179 A192 A333 X42 X52 X56 X60 X65 X70 Round Seamless Carbon Steel Pipe, Find Details and Price about Seamless Steel Pipe Carbon Steel Pipe from API 5L Psl1 Psl2 A106 A53 Gr. B A179 A192 A333 X42 X52 X56 X60 X65 X70 Round Seamless Carbon Steel Pipe - TIANJIN BOER KING STEEL CO., LIMITED