"substations, tractive effort, kilovolts, speed curve, amperes, synchronous speed, armature, initial acceleration, tractive, motor circuit, compensator, gear ratio, electromotive, induction motor, contactors, american institute, prof. bennett, smithsonian institution, trade name"
by
mshook
2007-07-27 19:30
book
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electric
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moter
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1920
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rail
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train
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railroad
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trolley
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transit
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subway