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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
Gas Pipe/Oil Pipe ASTM A106/API 5L Carbon Seamless Steel Pipe
5YRSTianjin Youfa International Trade Co., Ltd.
6YRSMESCO STEEL
oil carbon steel seamless linepipe
13YRSSinotai Petroleum Equipment Co., Ltd
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