North American Industry Classification System (NAICS) Canada 2017 Version 3.0
- 31-33 - Manufacturing
- 331 - Primary metal manufacturing
- 3314 - Non-ferrous metal (except aluminum) production and processing
- 33141 - Non-ferrous metal (except aluminum) smelting and refining
- 331410 - Non-ferrous metal (except aluminum) smelting and refiningUS
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