Besides the more obvious broadcast, emergency and mobile radio services there are cellular and cordless telephones, radar, garage door openers and other remote controls, telemetry, and amateur and CB radio.
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美
释义
无线电频谱除了广播频段,应急通信频段和移动通信频段以外,还包括蜂窝电话、绳电话、达、控器、线电爱好者和民用频段。
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