pole change type AC generator

例句：

1. 1. The new polechange type AC generator has greatly improved the efficiency of our power system.
   新型极坐标变换型交流发电机大大提高了我们电力系统的效率。
2. 2. The pole change type AC generator is widely used in various industries due to its high reliability and stability.
   由于其高可靠性和稳定性，极坐标变换型交流发电机在各行业中得到了广泛应用。
3. 3.In order to ensure the safe operation of the pole change type AC generator, regular maintenance and inspection are necessary.
   为了保证极坐标变换型交流发电机的安全运行，定期维护和检查是必要的。