welding outfiting of boiler furnace

例句：

1. 1.The welding process is crucial for the structural integrity of the bridge.
   焊接过程对于桥梁的结构完整性至关重要。
2. 2. The engineer used a special welding rod to repair the damaged part of the pipe.
   工程师使用一种特殊的焊条来修复管道的损坏部分。
3. 3.Welding is a skill that requires years of practice and training.
   焊接是一项需要多年实践和培训的技能。