epigular

例句：

1. 1. The engineer designed a circular pipe for the water supply system.
   工程师设计了一个用于供水系统的圆形管道。
2. 2.The construction of the bridge required the use of several circular pipes.
   建造桥梁需要使用几根圆形管道。
3. 3. The scientist found that the circular pipe was not leaking after being tested.
   科学家发现，经过测试后，那个圆形管道没有泄漏。