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School post box letter arrival alert system having post boxes with light and/ or command unit displaying words post arrival alerting.
School post box letter arrival alert system having post boxes with light and/ or command unit displaying words post arrival alerting.
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机译:学校邮政信箱信件到达警报系统,其邮政信箱带有指示灯和/或命令单元,用于显示单词到达后警报。
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摘要
The post box letter alerting system has a number of post boxes (19) with light alerts (1). The post distribution is alerted by the light alert and there is also a control unit (4) on each post box displaying written words form a command table.
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