- Radiotelephone Communications, Hamtramck
- Railroad Companies, Hamtramck
- Real Estate, Hamtramck - Agent, Broker & Companies
- Real Estate Services, Hamtramck
- Real Estate Services Franchises, Hamtramck
- Recording Studio Equipment, Hamtramck
- Records, Tapes, Cd & Dvd Manufacturers, Hamtramck
- Records, Tapes, CDs - Used & Vintage, Hamtramck
- Recreational Services, Hamtramck
- Recycling Drop-Off Centers, Hamtramck
- Recycling Scrap & Waste Materials, Hamtramck - Scrap Metal, etc
- Refiners & Smelters Metals, Hamtramck
- Rehabilitation Centers, Products & Services, Hamtramck
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- Rehabilitation Specialists, Hamtramck
- Religious Organizations, Hamtramck
- Rental & Leasing Business Equipment, Hamtramck
- Repair Services, Hamtramck
- Research Services, Hamtramck
- Residential, Hamtramck
- Residential Apartments, Hamtramck
- Resins Wholesale & Retail, Hamtramck - Plastic Raw Materials
- Restaurants/Food & Dining, Hamtramck
- Rigging Service & Crane Hoisting, Hamtramck
- Roadside Assistance, Road Service & Towing Service, Hamtramck
- Roofing Consultants, Hamtramck - Roofing Companies
- Roofing Contractors, Hamtramck - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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