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Pumped-storage power station

hydroelectric energy storage station using two water reservoirs connected with a pump and a turbine

Pronunciation
/pʌmpt - ˈstɔːrɪʤ ˈpaʊə ˈsteɪʃən/
/pəmpt - ˈstɔrɪʤ ˈpaʊər ˈsteɪʃən/