peripheral joint of arch dam

例句：

1. 1. Theengineer designed the new building with a peripherai joint that would allow foreasy expansion.
   工程师设计了这座新建筑，其边缘关节设计得可以方便扩展。
2. 2. The team worked together to develop aperipherai joint system that couldbe used in various applications.
   团队共同努力开发了一个可用于多种应用的边缘关节系统。
3. 3. Theresearch focused on the design of a newperipherai joint that could improvethe performance of robotic arms.
   研究专注于设计一种新型边缘关节，以提高机器人臂的性能。