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| धातु | शोधन प्रक्रिया |
|---|---|
| $I$. $Hg$ (पारा) | आसवन |
| $II$. $Cu$ (तांबा) | पोलिंग |
| $III$. $B$ (बोरोन) | जोन रिफाइनिंग |
| $IV$. $Ti$ (टाइटेनियम) | द्रवण (Liquation) |
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