COPPER SMELTING
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Details ore conversion into metallic copper including crushing, smelting, refining, and casting processes.
Sources
- 16mm Filmography (legacy record) — title, description, catalog record
- Educational Film Guide 1946 — title, year, creator, length, format, sound, description, catalog record
- 3434 U.S. Government Films — title, year, creator, length, format, sound, description, catalog record
Original permalink · Record added 2026-02-16 20:04:25