triband

例句：

1. 1. The triband filter is used to separate different frequencies.
   三带滤波器用于分离不同频率。
2. 2.The triband antenna has a wide bandwidth and can be used for high-speed communication.
   三带天线具有宽频带，可用于高速通信。
3. 3. The triband system provides better signal quality and coverage in urban areas.
   三带系统在城市地区提供更好的信号质量和覆盖范围。