Welded steel pipe products from Tianjin Zhonghui Steel Pipe
带钢高频焊接成型,焊缝平整、直线度好,外径19-219mm常规生产,可做黑管或再热镀锌,满足结构与流体用管需求。
Strip steel formed by high-frequency welding with smooth weld seam and excellent straightn...