North American Industry Classification System (NAICS) 2002
- 21 - Mining and Oil and Gas Extraction
- 213 - Support Activities for Mining and Oil and Gas Extraction
- 2131 - Support Activities for Mining and Oil and Gas Extraction
- 21311 - Support Activities for Mining and Oil and Gas Extraction
- 213111 - Oil and Gas Contract Drilling
- 213117 - Contract Drilling (except Oil and Gas)CAN
- 213118 - Services to Oil and Gas ExtractionCAN
- 213119 - Other Support Activities for MiningCAN
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