bearing ores; mining community; mining ore, transporting to mill, smelting ore to produce zinc oxide and metallic zinc; industrial uses recovering by-products; of zinc oxide and metallic zinc. Animated diagrams. (30 minutes),.. 17 The Zipper Fleet U.S. Department of the Navy
Looking up bearing ores; mining community; mining ore, transporting to mill, smelting ore to produce zinc oxide and metallic zinc; industrial uses recovering by-products; of zinc oxide and metallic zinc. Animated diagrams. (30 minutes),.. 17 The Zipper Fleet U.S. Department of the Navy on Wikipedia…
Filmography in the catalog
Credited on 1 film (1947) — matched by name in the Creator or Credits field.