ballast pump

例句：

1. 1.The ballast pump is used to maintain the proper voltage level in the power system.
   镇流器泵用于保持电力系统中的适当电压水平。
2. 2. The ballast pump was installed at the end of the transformer to prevent overheating.
   镇流器泵安装在变压器的末端，以防止过热。
3. 3. The ballast pump is a critical component of the electrical system, ensuring that the power supply remains stable.
   镇流器泵是电气系统的关键部件，确保电力供应保持稳定。