narrow gap one side welding

例句：

1. 1.The narrow gap between the two countries has been a source of tension for years.
   两国之间的狭窄间隙多年来一直是紧张的根源。
2. 2.The engineer used a narrow gap welding technique to join the metal plates together.
   工程师使用一种狭窄间隙焊接技术将金属板连接在一起。
3. 3. In this particular case, the narrow gap was caused by an uneven surface.
   在这个特定的情况下，狭窄间隙是由不平整的表面造成的。