Set two emergency buttons, a north-south control lights, a light control things.

设定两个紧急按钮，一个控制南北灯，一个控制东西灯。

youdao

Set two emergency buttons, a north-south control lights, a light control things.

设定两个紧急按钮，一个控制南北灯，一个控制东西灯。

youdao