贝尔实验室纵横中央局交换机问世。

Bell introduces crossbar central office switches.

youdao

对解决纵横制电话交换机的管理问题开辟了一条新的途径。

Thus, a new approach to solving the management problem for the crossbar switching system is devel - oped.

youdao

对解决纵横制电话交换机的管理问题开辟了一条新的途径。

Thus, a new approach to solving the management problem for the crossbar switching system is devel - oped.

youdao