File:Thompson, Silvanus P. – Polyphase electric currents and alternate-current motors, 1901 – BEIC 6575273.jpg
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![File:Thompson, Silvanus P. – Polyphase electric currents and alternate-current motors, 1901 – BEIC 6575273.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Thompson%2C_Silvanus_P._%E2%80%93_Polyphase_electric_currents_and_alternate-current_motors%2C_1901_%E2%80%93_BEIC_6575273.jpg/379px-Thompson%2C_Silvanus_P._%E2%80%93_Polyphase_electric_currents_and_alternate-current_motors%2C_1901_%E2%80%93_BEIC_6575273.jpg?20220321144222)
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