local trunk meaning in Chinese
局内中继线
市内中继线
Examples
- All these changes took place after the first spc exchange was put into service in the capital in 1984 , enabling the use of pcm circuits for local trunks
这是从1984年北京开通第一个程控交换局，首次在市内中继使用pcm数字电路之后巨大的变化。