stationary attenuator

例句：

1. 1. The stationary attenuator in the radio receiver helps to reduce interference.
   无线电接收机中的固定衰减器有助于减少干扰。
2. 2. The stationary attenuator is used to adjust the signal level.
   固定衰减器用于调整信号水平。
3. 3. The stationary attenuator is essential for maintaining a stable signal transmission.
   固定衰减器对于保持信号传输的稳定性至关重要。