短語詞組短語welding seam auto tracking 銲縫跟蹤technique of welding seam tracking 銲縫跟蹤技術(shù)Fillet Welding Seam -Tracking 角銲縫跟蹤Laser Welding Seam Tracking System 激光銲縫跟蹤系統(tǒng)welding automatic tracking seam 銲接縫隙 返回 welding seam tracking