
Jewellery and precious metals - Fineness of precious metal alloys (ISO 9202:2019)
出版:National Standards Authority of Ireland

专家解读视频
This document specifies a range of fineness of precious metal alloys (excluding solders) recommended for use in the field of jewellery
EN ISO 9202:2019 - Identical
ISO 9202 : 2019 - Identical
EN ISO 9202:2019 - Identical
ISO 9202 : 2019 - Identical