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Subject
- Machinery.[remove]24
- Engineering.3
- Factories.3
- Manufacturing processes.3
- Earthmoving machinery.2
- Actresses.1
- Animal cages.1
- Bathing suits.1
- Bears.1
- Bicycles.1
- Blizzards.1
- Brookgreen Gardens.1
- Canals.1
- Cement.1
- Construction workers--United States.1
- Construction.1
- Cranes, derricks, etc.1
- Curtiss CW-20 (Transport plane)1
- Damages.1
- Dams--Design and construction.1