bn:03782624n
Noun Concept
Categories: Metallurgical processes
EN
refining  Copper refining  Iron refining  Lead refining  metal refining
EN
In metallurgy, refining consists of purifying an impure metal. Wikipedia
English:
metallurgy
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EN
In metallurgy, refining consists of purifying an impure metal. Wikipedia
Process of purifying metals Wikidata
Wikipedia
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