黄金成色单位；18开是75%的黄金；纯金为二十四开

黄金成色单位；18开是75%的黄金；纯金为二十四开的英文翻译

基本释义

• the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75%25 gold; 24-karat gold is pure gold