Regulation No 31 of the United Nations Economic Commission for Europe (UN/ECE) concerning the uniform provisions concerning the approval of halogen sealed-beam unit (HSB unit) motor vehicle headlamps emitting an asymmetrical passing beam or a driving beam or both
联合国欧洲经济委员会(联合国/欧洲经委会)第31号条例 关于批准发出非对称近光或远光或两者的卤素密封光束单元(HSB单元)机动车前照灯的统一规定
Regulation No 31 of the United Nations Economic Commission for Europe (UN/ECE) concerning the uniform provisions concerning the approval of halogen sealed-beam unit (HSB unit) motor vehicle headlamps emitting an asymmetrical passing beam or a driving beam or both