high frequency AC welding machine

例句：

1. 1. Thishigh-frequency AC welding machineis very efficient in cutting metal.
   这台高频交流弧焊机在切割金属方面非常高效。
2. 2. The technician used the high-frequency AC welding machine torepair the damaged part of the machine.
   技术人员使用高频交流弧焊机来修理机器的损坏部分。
3. 3. The high-frequencyAC welding machine was used tojoin two pieces of metal together quickly andefficiently.
   高频交流弧焊机被用来快速而有效地将两块金属连接在一起。