wide pattern return bend

例句：

1. 1. The car's wide pattern return bend is designedto improve fuel efficiency.
   汽车的宽幅图案返回弯曲设计旨在提高燃油效率。
2. 2. Theengineer used a wide pattern return bend tocreate the intricate design.
   工程师使用宽幅图案返回弯曲来创造复杂的设计。
3. 3. The widepattern return bend in the bridge was crucialfor its stability.
   桥梁中的宽幅图案返回弯曲对于其稳定性至关重要。