缝焊管

1.
ERW
高频焊接技巧的呈现和成熟,间接推进了弯缝焊管产业的宏大倒退,它是弯缝焊管ERW)死产的要害工序。高频焊接品质的歹坏,间接 …
honghen1993.blog.163.com|Based on 6 pages
2.
HFW
缝焊管(HFW),镀锌钢管,钢塑复合管的制造与销售,产品已履盖石油天然气输送全流程. 其中直缝埋弧焊管(SAWL)为公司报告期首次合并沙 …
quote3.eastmoney.com|Based on 1 page

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