Arcis阿尔西arcn.弧；弧形物vi.形成电弧；按弧形轨迹行进arc stud welding machine电孤螺柱焊机arc-remelting overflow电弧重熔溢流法arc extinguishing device消弧装置arc-extinguishing coil消弧线圈Arc static charactistics电弧静特性arc - suppression coil消弧线圈arc-suppressing device消弧装置arc-spark spectroscopy电弧火花光谱学Arctium lappa L. roots牛蒡根arc welding power source弧焊电源