B61C15/00—Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels
B61C15/04—Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels by controlling wheel pressure, e.g. by movable weights or heavy parts or by magnetic devices
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Electric Propulsion And Braking For Vehicles
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