Jewellery - Colours of gold alloys - Definition, range of colours and designation (ISO 8654:2018 + Amd 1:2019); German version EN ISO 8654:2018 + A1:2019— 25 стр.
Jewellery - Colours of gold alloys - Definition, range of colours and designation (ISO 8654:2018 + Amd 1:2019); German version EN ISO 8654:2018 + A1:2019— 25 стр.