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- Shipbuilding industry--Employees 9
- Dry docks 7
- Port of Portland (Or.) 7
- Shipyards 7
- Building materials 6
- Shipbuilding 5
- Harbors 2
- Barges 1
- Cranes, derricks, etc 1
- Docks 1
- Dredges 1
- Machinery 1
- Ships 1
- Ships--Maintenance and repair 1