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An apparatus for recording and / or reproducing and / or delete of material to be applied on a circulating current toe traeger electromagnetically, in particular for current which can be used in telephone systems with waehlerbetrieb shock transmitter
An apparatus for recording and / or reproducing and / or delete of material to be applied on a circulating current toe traeger electromagnetically, in particular for current which can be used in telephone systems with waehlerbetrieb shock transmitter