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device for the production and transmission of occasional or periodic benoetigtentonfrequenten wechselstroemen different frequencies of cables, in particular to power lines, resonanzorganen holdings of any kind, and in particular electrical nebenuhren
device for the production and transmission of occasional or periodic benoetigtentonfrequenten wechselstroemen different frequencies of cables, in particular to power lines, resonanzorganen holdings of any kind, and in particular electrical nebenuhren