Variant of NAICS 2012 - Energy sector
- Non E - Industries not included in the energy sector
- 21e - Mining, quarrying, and oil and gas extraction, non E
- 212e - Mining and quarrying (except oil and gas), non E
- 2122e - Metal ore mining, non E
- 21221 - Iron ore mining
- 212210 - Iron ore mining
- 21222 - Gold and silver ore mining
- 212220 - Gold and silver ore miningCAN
- 21223 - Copper, nickel, lead and zinc ore mining
- 212231 - Lead-zinc ore miningUS
- 212232 - Nickel-copper ore miningCAN
- 212233 - Copper-zinc ore miningCAN
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