overtone normal mode

例句：

1. 1. Theovertone normal mode is used to transmithigh-frequency signals.
   超音波正常模式用于传输高频信号。
2. 2. In theovertone normal mode,the signal is transmitted through aseries of filters.
   在超音波正常模式下，信号通过一系列过滤器进行传输。
3. 3.The overtone normal mode is commonly usedin medical imaging systems.
   超音波正常模式在医疗成像系统中被广泛使用。