changed wall thickness pipeline

例句：

1. 1. The engineer designed a changed wallthickness pipeline to improve the efficiency of themachinery.
   工程师设计了一个改变壁厚的管道，以提高机器的效率。
2. 2. The new pipeline is designedwith a changed wall thickness to reduce therisk of leaks.
   新管道的设计考虑到了壁厚的变化，以减少泄漏的风险。
3. 3.The construction company used a changed wall thicknesspipeline to ensure the stability of the foundation.
   建筑公司使用了改变壁厚的管道，以确保地基的稳定性。