1. seamless steel pipes, yushu cold-drawn seamless steel pipes, real manufacturers, can be visited and inspected, direct sales of all products, spot or customized design and manufacturing of process equipment 1 square pipes, cold-drawn square pipes, seamless square pipes, black welded pipes, hot-dip galvanized square pipes, hot-dip galvanized welded pipes, thin-walled welded pipes, thick-walled seamless steel pipes and other pipes. consultation hotline: 15966288080, sufficient inventory, complete varieties and specifications. 30 people

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