Plastics - Determination of the total luminous transmittance of transparent materials - Part 2: Double-beam instrument (ISO 13468-2:2021); German version EN ISO 13468-2:2021— 15 стр.
Plastics - Determination of the total luminous transmittance of transparent materials - Part 2: Double-beam instrument (ISO 13468-2:1999); German version EN ISO 13468-2:2006— 11 стр.
Plastics - Determination of the total luminous transmittance of transparent materials - Part 2: Double-beam instrument (ISO/FDIS 13468-2:2020); German and English version prEN ISO 13468-2:2021— 15 стр.
Plastics - Determination of the total luminous transmittance of transparent materials - Part 2: Double-beam instrument (ISO 13468-2:1999); German version EN ISO 13468-2:2006— 11 стр.