电话: telephone; phone; telephone ...用: 40分钟跑完全程 run the course in 4 ...双音多频: dual-tone multifrequency式: type; style按键号盘: push-button dialling pad测试: test; testing; checkout; mea ...方法: method; means; way; techniqu ...电话用双音多频式按键号盘技术要求: performance requirements of pushbutton dialer with dtmf电话用脉冲式按键号盘测试方法: methods of measurement for pushbutton dialer with pulse双音多频式按键电话机测试方法: methods of measurement for pushbutton telephone with dtmf双音多频式按键电话机技术要求: performance requirements of pushbutton telephone with dtmf电话用脉冲式按键号盘技术要求: performance requirements of pushbutton dialer with pulse脉冲式按键电话机测试方法: methods of measurement for pushbutton telephone with pulse双音多频按键话机: dtmf phone set按键号盘: push button dialing pad（双音多频）音调: dtmf双音多频: dtmf double tone multi frequency; dtmf double tone multi-frequency; dtmf dual tone multifrequency; dtmf dual tone multiple frequency; dual tone multi frequency，dtmf; dual tone multi-frequency dtmf; dual-tone multifrequency双音多频制: dual-tone multifrequency system (dtmf)双音多频信号: dual-tone multifrequency signaling双音多频信令: dtmf dual tone multifrequecy signaling双音多频序列: dtmf双音多频应用: dtmf拨号盘测试器: dial test set; dial tester确认双音多频发送: conf.dtmf sending双音多频接收机: dual tone multifrequency receiver
