A summary of the considerations which influenced the Swiss Commission to adopt a frequency of 15 periods per second. (2500 w.) (No. 5734 D)
Choice of frequency for the alternating current railways of Switzerland
Choix de la Frequence pour la Traction par Courant alternatif des Chemins de Fer suisses
1909
Aufsatz (Zeitschrift)
Französisch
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