automatic arc welding machine

例句：

1. 1. Thisautomatic arc welding machine isvery efficient in cutting metal.
   这台自动电弧焊机在切割金属方面非常高效。
2. 2. The technicians used this automaticarc welding machine to repair thedamaged pipe.
   技术人员使用这台自动电弧焊机来修理损坏的管道。
3. 3. Thecompany has invested in a new automaticarc welding machine to improve productionefficiency.
   该公司投资了一台新的自动电弧焊机以提高生产效率。