Electromechanical prime movers
621.462
B434E and Bell, Peter C., ed.
Electromechanical prime movers
-- London : Macmillan , 1972
184655 69p.:ill.
Electric motors
B434E and Bell, Peter C., ed.
Electromechanical prime movers
-- London : Macmillan , 1972
184655 69p.:ill.
Electric motors