monotube pile

例句：

1. 1. The monotube isused to connect two circuits together.
   单管用于连接两个电路。
2. 2. Themonotube pile is acommon component in many electronic devices.
   单管柱是许多电子设备中常见的组件。
3. 3. The monotube pile was designedto improve the signal transmission efficiency.
   单管柱的设计旨在提高信号传输效率。