A fire alarm automatic system was introduced, it was developed with smoke sensor and telephone.
介绍一种火灾自动报警系统。该系统应用了离子感烟传感器和电话。
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。
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。
应用推荐