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arrangement for adjustment of mehrphasenwechselstrom a frequency in other frequency alternating current, especially einphasenstrom low frequency by means of gittergesteuerter entladungsgefaesse, preferably with steam or gasfuellung
arrangement for adjustment of mehrphasenwechselstrom a frequency in other frequency alternating current, especially einphasenstrom low frequency by means of gittergesteuerter entladungsgefaesse, preferably with steam or gasfuellung
