both sides welding

例句：

1. 1.The construction workers are performing both sides welding on the bridge.
   建筑工人正在桥上进行双方焊接作业。
2. 2. The carpenter is doing both sides welding to reinforce the structure.
   木匠正在进行双方焊接加固结构。
3. 3. During the assembly process,it's important to ensure that bothsides welding is done correctly.
   在组装过程中，确保双方焊接正确完成非常重要。