backing welding

例句：

1. 1. The engineer used a backing welding process to reinforce the steel beam.
   工程师使用一种背焊工艺来加固钢梁。
2. 2. The backing welding technique is essential for ensuring the structural integrity of the bridge.
   背焊技术对于确保桥梁结构完整性至关重要。
3. 3. During the construction, the backing welding was done carefully to avoid any potential damage to the surrounding materials.
   施工过程中，背焊工作被仔细进行，以避免对周围材料造成潜在损害。