grid-return tube

例句：

1. 1.The grid-return tube is used to connect the computer's motherboard and the hard drive.
   网格返回管用于连接计算机主板和硬盘。
2. 2.The engineer designed a new grid-return tube to improve the efficiency of the system.
   工程师设计了一种新型的网格返回管，以提高系统的效率。
3. 3. The grid-return tube was installed in the factory to ensure that the production process was smooth.
   在工厂安装网格返回管以确保生产过程顺畅。