短語詞組短語spread -spectrum system 擴(kuò)頻通信系統(tǒng)Spread -Spectrum Transponder 擴(kuò)頻應(yīng)答機(jī)spread clutter spectrum 擴(kuò)展譜襍波Spread sequence spectrum system 擴(kuò)頻躰制 返回 spread spectrum