fixed welding machine

例句：

1. 1.The fixed welding machine is used to weld metal together.
   固定焊接机用于将金属焊接在一起。
2. 2.This machine is designed for heavy-duty applications where precision is required.
   这种机器是为需要精确度的应用而设计的，适用于重载场合。
3. 3. The operator must be trained in the safe use of this machine before it can be operated.
   操作员在能够操作这台机器之前必须接受安全使用培训。