平行缝焊 seam welding: 滚焊; 焊缝; 流缝熔接; 线焊接;缝焊; 纵缝焊接welding seam: 对接焊缝; 焊缝welding seam no: 焊缝编号parallel welding: 平行焊arc seam welding: 电弧缝焊下载手机词典可随时随地查词查翻译