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Subject
- Engineering.[remove]16
- Physics.3
- Architectural models.2
- Architecture.2
- Construction workers.2
- Electricity.2
- General Electric Company.2
- Railroad tunnels.2
- Aeronautics.1
- Airships.1
- Bridges--Design and construction.1
- Cascade Range.1
- Cascade Tunnel (Wash.)1
- Construction.1
- Cranes, derricks, etc.1
- Cruisers (Warships)--United States--History--20th century.1
- Dams--Design and construction.1
- Destroyers (Warships)--United States--History--20th century.1
- Dollhouses.1
- Electric generators.1