Naics code Naics crossreference
21211 Providing support activities (except geophysical surveying and mapping, site preparation, construction, and transportation) for the mining of coal on a contract or fee basis--are classified in Industry 21311, Support Activities for Mining.
212114 Underground mining and/or development of underground bituminous and anthracite coal mines--are classified in U.S. Industry 212115, Underground Coal Mining
212114 Providing support activities (except geophysical surveying and mapping, site preparation, construction, and transportation) for the mining of coal on a contract or fee basis--are classified in U.S. Industry 213113, Support Activities for Coal Mining
212114 Manufacturing coke oven products in coke oven establishments--are classified in U.S. Industry 324199, All Other Petroleum and Coal Products Manufacturing
212114 Manufacturing coal products in steel mills--are classified in Industry 331110, Iron and Steel Mills and Ferroalloy Manufacturing.
212115 Surface mining and/or beneficiating of bituminous coal, lignite, and anthracite coal--are classified in U.S. Industry 212114, Surface Coal Mining
212115 Providing support activities (except geophysical surveying and mapping, site preparation, construction, and transportation) for the mining of coal on a contract or fee basis--are classified in U.S. Industry 213113, Support Activities for Coal Mining
212115 Manufacturing coke oven products in coke oven establishments--are classified in U.S. Industry 324199, All Other Petroleum and Coal Products Manufacturing
212115 Manufacturing coal products in steel mills--are classified in Industry 331110, Iron and Steel Mills and Ferroalloy Manufacturing.
212210 Establishments primarily engaged in manufacturing pig iron ore are classified in Industry 331110, Iron and Steel Mills and Ferroalloy Manufacturing.