TCVN 6974-2001 Road vehicles.Headlamps emitting an asymetrical passing beam or a driving beam or both and equipped with halogen filament lamps (H4 lamps) for power-driven vehicles.Requirements and test methods in type approval
2001TCVN 6974-2001 Road vehicles.Headlamps emitting an asymetrical passing beam or a driving beam or both and equipped with halogen filament lamps (H4 lamps) for power-driven vehicles.Requirements and test methods in type approval