2.13. |
Retro-reflecting devices are divided into three classes according to their photometric characteristics: Class IA or IB, Class IIIA or IIIB and Class IVA. |
a0c0 |
2.13. |
Retro-reflecting devices are divided into three classes according to their photometric characteristics: Class IA or IB, Class IIIA or IIIB and Class IVA. |
a0c0 |