semi-automatic welding machine

例句：

1. 1. This semi-automaticwelding machine is very efficient incutting metal.
   这台半自动焊接机在切割金属方面非常高效。
2. 2. The engineerused the semi-automatic welding machine to quickly repair the damaged partof the car.
   工程师使用这台半自动焊接机快速修理了汽车损坏的部分。
3. 3. The company has invested in a newsemi-automatic welding machineto improve production efficiency.
   该公司投资了一台新的半自动焊接机以提高生产效率。