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Topic
- Building materials 25
- Shipbuilding industry--Employees 10
- Shipbuilding 10
- Dry docks 9
- Construction projects 8
- Shipyards 8
- Buildings 7
- Bodies of water 3
- Port of Portland (Or.) 3
- Scaffolding 3
- Cranes, derricks, etc 2
- Men 2
- Bricks 1
- Building 1
- Cargo ships 1
- Electric lines 1
- Employees 1
- Factories 1
- Flags 1
- Iron industry and trade 1
