1. External beauty can be enhanced by covering the body.
2. Impact can be absorbed when a car topples over.
3. Noise-absorption, noise-proof, and noise-insulation will
    be provided while driving a car.
4. A space for mounting electronic components
    (the room lamp, cargo lamp, and speaker grille)
5. A side space for mounting a sun visor is secured.
6. A space for mounting the air-conditioner vent grille
    is secured.