"Illumination of the retro-reflective device" is the abbreviated expression used conventionally to designate the illumination measured in a plane perpendicular to the incident rays and passing through the centre of reference. |
a10c0 |
"Illumination of the retro-reflective device" is the abbreviated expression used conventionally to designate the illumination measured in a plane perpendicular to the incident rays and passing through the centre of reference. |
a10c0 |