helical seam submerged-arc welded pipe的意思|示意
美 / /
英 / /
螺旋缝埋弧焊管
helical seam submerged-arc welded pipe的网络常见释义
螺旋缝埋弧焊钢管 螺旋缝埋弧焊钢管helical seam submerged-arc welded pipe 镀锌焊接钢管galvanized welded steel pipe ..