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Means for emitting an optical and/or an acoustic signal, these signals being used for commemorating an event that is related to a predetermined date
Means for emitting an optical and/or an acoustic signal, these signals being used for commemorating an event that is related to a predetermined date
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机译:用于发出光和/或声信号的装置,这些信号用于纪念与预定日期有关的事件
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摘要
The optical or sound message transmitter has a programmable electronic circuit (12) with a battery (14) with sound or optical transmission (13). There is a memory which triggers off the sound or optical greeting at the correct time and date.
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