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machine use know gold under earth

machine use know gold under earth

To combat this weakness,goldis usually alloyed with another member of the metal family such as silver, copper, platinum, or nickel.Goldalloys are measured by karats (carats). A karat is a unit equal to 1/24 part of puregoldin an alloy. Thus, 24 karat (24K)goldis puregold, while 18 karatgoldis 18 parts puregoldto 6 parts other metal

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