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DK107255A1954-04-011955-03-29Apparat med et elektrisk udladningsrør, der har to glødeelektroder, som fødes fra en glødestrømstransformator.
DK87399C
(da)
Dispositivo di regolazione del valore efficace della corrente di un circuito alimentato da una sorgente di corrente alternata monofase, particolarmente per saldatrici elettriche.