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Cross-system equivalents backed by official correspondence tables and exact code matches — never guesses. Approximate mappings are labeled. How it works →
No verified match yet for NAICS 21223
We only show conversions backed by official tables or exact matches — a verified NAICS → ISIC mapping for 21223 Copper, Nickel, Lead, and Zinc Mining isn't available. Broader matches may exist at a higher level: