Frequency Changing Station

building in Spokane, Washington

en-GB/ˈfɹiːkwənsɪ ˈt͡ʃeɪnd͡ʒɪŋ ˈsteɪʃən/
en-US/ˈfɹikwənsi ˈt͡ʃeɪnd͡ʒɪŋ ˈsteɪʃən/

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electrical substationtraction current converter plant