按钮式电话拔号盘
button type telephone dial
按钮式发端缓存器
pushbutton originating register
按钮式高速脉冲拨号电子电话的呼叫系统
push button high-speed pulse dialling calling system for electronic telephone
按钮式火焰点火器
push button flame ignitor
按钮式行人信号灯
pedestrian traffic signal with buttons
按钮式音频注册登记
TTR Touch Tone Registration