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Mirosław Romański talks about the 25kV 50Hz AC railway network and compares it with the standard 3kV DC network used on the Polish railway. In the current conditions and the investment of many resources in the 3kV network, is it justified to change it to a 25kV AC network? Are there specific arguments that outweigh such a decision? --------------------------------------------- ✅ Production, development and editing: MIROSŁAW ROMAŃSKI ------------------------------------------------------------ ✅ If you are interested in receiving notifications about new films, please subscribe to the channel 🔔 👉 / mirmur2 ago you will receive regular notifications about materials on this channel -------------------------------------------- ✅ IF YOU WANT TO SUGGEST A FILM TOPIC OR HAVE ANOTHER QUESTION, YOU CAN WRITE: 📫 Contact: [email protected] -------------------------------------------- ✅ SUPPORT THE CHANNEL - DEVELOPMENT --------------------------------------------