North American Industry Classification System (NAICS) 1997
- 31-33 - Manufacturing
- 331 - Primary Metal Manufacturing
- 3315 - Foundries
- 33151 - Ferrous Metal Foundries
- 331511 - Iron Foundries
- 331514 - Steel Foundries
- 33152 - Non-Ferrous Metal Foundries
- 331523 - Non-Ferrous Die-Casting Foundries
- 331529 - Non-Ferrous Foundries (except Die-Casting)
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