two-phase transformer

例句：

1. 1. The two-phase transformer is used to convert AC power into DC power.
   两相变压器用于将交流电转换为直流电。
2. 2. In this case, the two-phase transformer was designed to improve efficiency.
   在这种情况下，两相变压器被设计来提高效率。
3. 3. The two-phase transformer was installed in the substation to ensure stable power supply.
   在变电站安装两相变压器以确保稳定的电力供应。