NF T51-065-2*NF EN ISO 13468-2:2021 Plastics - Determination of the total luminous transmittance of transparent materials - Part 2 : double-beam instrument
2021NF T51-065-2*NF EN ISO 13468-2:2021 Plastics - Determination of the total luminous transmittance of transparent materials - Part 2 : double-beam instrument
2006NF T51-065-2:2006 Plastics - Determination of the total luminous transmittance of transparent materials - Part 2 : double-beam instrument.