float get_height() const { return height; }
const std::vector<Axle> &get_axles() const { return axles; }
const std::vector<Bogie> &get_bogies() const { return bogies; }
float get_height() const { return height; }
const std::vector<Axle> &get_axles() const { return axles; }
const std::vector<Bogie> &get_bogies() const { return bogies; }