名词
中文翻译：窄带控制器
同义词：
['narrowband controller', 'narrow-band transmitter', 'narrow-band radio', 'narrow-band receiver']
例句：
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1. The narrow-band controller was used to control the frequency of the signal.
窄带控制器用于控制信号的频率。
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2. The narrow-band controller was responsible for monitoring and adjusting the transmission parameters.
窄带控制器负责监控和调整传输参数。
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3. The narrow-band controller was used to transmit high-frequency signals over long distances.
窄带控制器用于在长距离上传输高频信号。