By means of BX1-500 AC arc welding machine,E4303 welding rod,the welding has been performed on the spiral welded pipe with the material of Q235 and specification of 820mmX10mm.是什么意思_By means of BX1-500 AC arc welding machine,E4303 welding rod,the welding has been performed on the spiral welded pipe with the material of Q235 and specification of 820mmX10mm.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句