The automatic telephone inquiry system has been widely used in many cities in our country.

计算机自动查号系统已在我国大部分县级以上城市开通。

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This article is proposed to develop a new type of digit programme-controlled telephone switching board which is based upon the CAN bus to replace the old automatic telephone switchboard.

本文提出研制新型的基于CAN总线的数字程控交换机替换原有的全电子式自动电话交换机。

youdao

This article is proposed to develop a new type of digit programme-controlled telephone switching board which is based upon the CAN bus to replace the old automatic telephone switchboard.

本文提出研制新型的基于CAN总线的数字程控交换机替换原有的全电子式自动电话交换机。

youdao