短語詞組短語radio broadcast communication 無線電廣播通訊train radio dispatching communication 無線列調(diào)radio scattering communication 無線電散射通信radio trucking communication 無線集群通信smart radio frequency communication 智能射頻通信radio relay communication system 無線接力系統(tǒng)radio -communication equipment 無線電通訊設(shè)備 返回 radio communication