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Write an appropriate main factor for each subcategory given below; Main head: Metal finishing 1 . Ordinary metals 2 . Precious metals 3 . Complex
Write an appropriate main factor for each subcategory given below;
Main head: Metal finishing
Ordinary metals
Precious metals
Complex metals
Hexavalent chromium plating
Cyanide used processes
Oily wastewater
Wastewater including solvents
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