每个房间里有一个组合继电器/指示器单元连接到它自己的中继顶.一个这样的单元被安装在每个楼层走廊的一个方便的位置,并将所有房间地板上连接到它.每一楼层单元依次连接在经理的办公室的一个指标,钟.当在一个房间里的按钮被按下,相应的继电器拉下来,指示标志,在指标股的房间,这反过来放在经理的办公室,并在同一时间的声音在办公室一个钟,楼层指示标志.该电路是在楼层显示器单元复位.该方案可以是多种多样的,在每一层有一个钟和指示在无料钟的主要办公室.其他的变化也可以被设计来适应个人用户的喜好.
英语翻译There is a push in each room connected to its own relay
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