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DMH UNITED STEEL INDUSTRY CO.,LTD(USI Group) is one of the largest steel pipe groups in China. Established in1989,headquartered in Suzhou City,Jiangsu Province.USI group has 20 branch companies,total assets:1 billion dollars,more than 10000 employees
SMLS/ERW/LSAW/SSAW/Stainless Steel pipes/Steel Fittings
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