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Search: industry
Filter: Subject of mining engineering
| Date: | 1925 |
|---|---|
| Description: | View down railroad tracks of the National Zinc Separating Company grounds. There is a large mound of ores, railroad cars, industrial buildings and a tall b... |
| Date: | 1993 |
|---|---|
| Description: | Elevated view of trucks and conveyor belts working in the background of a limestone quarry. Grass and plants with small blossoms are in the foreground at t... |
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