当检测到病员呼叫时，控制器指示灯常亮并发出报警声。

Controller's indicator is normal on and send out alarm signal when detecting patient on sickbed calling.

youdao

当检测到病员呼叫时，控制器指示灯常亮并发出报警声。

Controller's indicator is normal on and send out alarm signal when detecting patient on sickbed calling.

youdao