defective brazing

例句：

1. 1. The defective brazing caused the joint to fail.
   缺陷焊接导致接头失效。
2. 2. The defective brazing was a major cause of the accident.
   缺陷焊接是这次事故的主要原因。
3. 3. The engineers used defective brazing to repair the damaged parts.
   工程师们使用缺陷焊接来修复损坏的部分。