无缝管销量与上一季度相比，分别增长2%，焊管的销售下降了15%和项目的焊接产品的销售下跌了9%。
Compared to the previous quarter, seamless tube sales volumes were up 2 percent, welded tube sales fell 15 percent and sales of welded products for projects slumped 9 percent.
无缝线路长钢轨通常由铁路焊轨厂或现场焊轨基地焊接。
Long rails in jointless track are usually made on welded rail site or in railway welded rail factory.
应用推荐