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High quality ASTM A106 Gr. b sch40 sch60 sch80 seamless carbon steel pipe black round steel pipe
6YRSTianjin Youfa International Trade Co Ltd
ASTM A182 F304L WNRF Flange 6 Inch Sch40S CL300
6YRSZhejiang Footo Pipe Fitting Manufacturing Co., Ltd.
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