二线系统 meaning in English
two-wire system
Examples
- First installation in canada ( edmonton , alta . ) . invention of small dial and two - wire system eliminating ground at subscriber ' s station
电话系统首次在加拿大（阿尔塔省埃德蒙顿）安装。发明小型拨号盘和二线系统，并取消用户端的地线。
two-wire system