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API 5L ASTM A53 ASTM A106 SEAMLESS CARBON STEEL PIPE
5YRSTianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd.
Rectangular Hollow Section S235JR(H) China yuantaiderun
5YRSTianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd.
7YRSTianjin Youfa International Trade Co., Ltd.
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