ballast tube

例句：

1. 1. The engineer carefully inspected the ballast tubes before installing them.
   工程师在安装前仔细检查了避雷管。
2. 2.The new power plant uses a special type of ballast tube to protect against lightning strikes.
   新的发电厂使用一种特殊的避雷管来抵御雷电袭击。
3. 3. The ballast tubes are crucial for maintaining the electrical stability of the power grid.
   避雷管对于保持电网的电气稳定性至关重要。