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。

youdao

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。

youdao