- Radiator Coolant & Solvents, Hamburg - Engine Coolant
- Radiotelephone Communications, Hamburg
- Ready Mix Concrete, Hamburg - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Hamburg
- Real Estate, Hamburg - Agent, Broker & Companies
- Real Estate Management, Hamburg
- Real Estate Services, Hamburg
- Recreational Equipment & Supplies Companies, Hamburg
- Recycling Scrap & Waste Materials, Hamburg - Scrap Metal, etc
- Refuse Collection & Disposal Services, Hamburg
- Religious Organizations, Hamburg
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- Repair Services, Hamburg
- Research & Development Bureaus, Hamburg - Commercial, Economic, Sociological & Educational Research
- Research Services, Hamburg
- Residential, Hamburg
- Residential Apartments, Hamburg
- Residential Construction Contractors, Hamburg - General Contractors
- Resorts & Hotels, Hamburg
- Restaurants/Food & Dining, Hamburg
- Riding & Rodeo Services, Hamburg
- Road Construction Equipment & Machinery, Hamburg
- Rubber Products - Retail, Hamburg
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