ultrasonic frequency range
英
美
- 超声频段
双语例句
- Each channel remains at an assigned frequency within a single band.
每个信道在单一的频段内保持分配的频率。 - We can't hear any program when we turn our radio onto this frequency band.
当收音机调到这个频段上时，什么节目也收听不到。
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