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Jewellery and precious metals - Fineness of precious metal alloys (ISO 9202:2019)
出版:International Organization for Standardization

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基本信息
標(biāo)準(zhǔn)編號: UNE-EN ISO 9202 : 2020
出版單位:International Organization for Standardization
標(biāo)準(zhǔn)頁數(shù):0
標(biāo)準(zhǔn)簡介
This document specifies a range of fineness of precious metal alloys (excluding solders) recommended for use in the field of jewellery.
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