constant-ratio frequency changer

例句：

1. 1.The constant-ratio frequency changer is used to adjust the frequency of a signal.
   常数比频率变换器用于调整信号的频率。
2. 2. The constant-ratio frequency changer was developed to improve the efficiency of power transmission.
   常数比频率变换器的开发旨在提高电力传输的效率。
3. 3. The constant-ratio frequency changer has been widely used in various industries, such as telecommunications and electronics.
   常数比频率变换器在电信和电子行业得到了广泛应用。