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In electric traction for a trapezoidal speed-time curve, the time period is

(A) free running speed period = constant speed period

(B) free running period = coasting period

(C) free running period + coasting period = constant speed period

(D) average speed period = scheduled speed period

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In electric traction for a trapezoidal speed-time curve, the time period is free running period + coasting period = constant speed period

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