The engine of the vehicle or an additional electric motor could be used as a source of external tractive force.

可用车辆发动机或一个附加电机作为一外加牵引力矩源。

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The engine of the vehicle or an additional electric motor could be used as a source of external tractive force.

可用车辆发动机或一个附加电机作为一外加牵引力矩源。

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