Variant of North American Industry Classification System (NAICS) 2022 Version 1.0 for Energy sector
- 2371 - Utility system construction
- 23711 - Water and sewer line and related structures construction
- 237110 - Water and sewer line and related structures constructionUS
- 23712 - Oil and gas pipeline and related structures construction
- 237120 - Oil and gas pipeline and related structures constructionUS
- 23713 - Power and communication line and related structures construction
- 237130 - Power and communication line and related structures constructionUS
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