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G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/16—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating an electro-dynamic continuously rotating motor
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Physics & Mathematics
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General Physics & Mathematics
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Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like
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