flat fillet weld

例句：

1. 1. The flat fillet weld was done by a professional welder.
   一个专业焊工完成了平直焊缝焊接。
2. 2. The flat fillet weld is a crucial part of the construction process.
   平直焊缝焊接是建筑过程中至关重要的一部分。
3. 3.The flat fillet weld has been tested to ensure its strength and durability.
   平直焊缝焊接经过测试以确保其强度和耐用性。