AC gas metal-arc welding process

例句：

1. 1. The AC gas metal-arcwelding process is widely used inthe construction industry.
   自动气体金属电弧焊接过程在建筑业中被广泛使用。
2. 2. Thenew design of the AC gas metal-arc welding process has greatly improvedefficiency.
   新型自动气体金属电弧焊接过程的设计大大提高了效率。
3. 3. The ACgas metal-arc welding process is a complextechnology that requires specialized training for operators.
   自动气体金属电弧焊接过程是一项复杂的技术，需要操作人员接受专门的培训。