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Mobile electrical substation

rail transport electrical substation, which is installed on a railway wagon

Pronunciation
/ˈmoʊbəl əˈlɛktrəkəl ˈsəbˌsteɪʃən/
/məʊˈbiːl ɪˈlɛktrɪkəl ˈsʌbsteɪʃən/