Steam locomotives or railcars; Electric locomotives or railcars; Locomotives or motor railcars with IC engines or gas turbines; Other locomotives or motor railcars; Filling stations for steam- or pneumatic-accumulator locomotives or motor railcars; Locomotives or motor railcars characterized by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars; Locomotives or motor railcars characterized by the type of means applying the tractive effort; Arrangement or disposition of running gear other than normal driving wheels; Locomotives or motor railcars characterized by their application to special systems or purposes; Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels; Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems.