bare metal arc weld

例句：

1. 1.The welder used a bare metal arc welder to join the two pieces together.
   焊工使用裸金属电弧焊机将两块材料焊接在一起。
2. 2.The construction site had to use a bare metal arc welder to avoid damaging the surrounding environment.
   为了不破坏周围环境，施工现场不得不使用裸金属电弧焊机。
3. 3. The engineer was asked to demonstrate the use of a bare metal arc welder during the training session.
   在培训课程中，工程师被要求演示裸金属电弧焊的使用。