direct telephone exchange

cord for telephone switchboards, insulated, for a voltage of between 81v and 1000v

电话交换台用绝缘软线,81至1000V电压用

call or clear indicator for telephone switch-boards and exchanges

呼叫或拆线指示器,电话交换台和交换机用的

unattended automatic exchange

无人值班自动电话交换台

cord for telephone switchboards, insulated for a voltage not exceeding 80v

电话交换台用绝缘软线,不超过80v电压用

Hello, switchboard, can I have a line, please?

喂，交换台，请给我接电话，好吗?

Then switchboards brought phone wires into one location.

然后，交换台使电话线集中到一个地点。

The telephone in my new flat hasn't been connected up to the exchange yet.

我新公寓里的电话还没有与交换台接通。

"Mobile phone exchanges, base stations and mobile phone subscribers, such as portable phones, handsets and so on."

主要有移动电话交换机，基站及移动台用户。

Research and Realization of the Supporting Platform of Manual Telephone Exchange Net;

人工电话交换网支撑平台的研究与实现

automatic switching of telegraph and telephone

电报-电话自动交换

computer telephone exchange

电脑自动电话交换机

common battery exchange

共电制电话交换机局

electronically controlled telephone exchange

电子控制电话交换机

electronic telephone switching system

电子式电话交换系统

semielectronic telephone switching system

半电子制电话交换机

cross office switching time

交叉电话局转换时间

automatic local exchange

市内电话自动交换机

automatic toll switching system

长途电话自动交换机