Single side band radio telephony ssb rt on 8812 khz 采用无线电话的8812千赫频道广播。先以广东话,后以英语广播。
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Today ' s trend toward sending lower - power signals over shorter ranges has occurred previously in wireless communications ? during the early days of radio telephony 在较短距离传送较低功率的讯号已经成为今天的趋势,但这种倾向早已见诸先前的无线通讯,也就是早期的无线电话。