North American Industry Classification System (NAICS) 1997
- 31-33 - Manufacturing
- 333 - Machinery Manufacturing
- 3336 - Engine, Turbine and Power Transmission Equipment Manufacturing
- 33361 - Engine, Turbine and Power Transmission Equipment Manufacturing
- 333611 - Turbine and Turbine Generator Set Unit Manufacturing
- 333619 - Other Engine and Power Transmission Equipment Manufacturing
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