- Race Track Equipment & Supplies, Mantua
- Racing Car Supplies, Mantua
- Radio & Tv Communications Equipment Manufacturers, Mantua
- Ready Mix Concrete, Mantua - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Mantua
- Real Estate, Mantua - Agent, Broker & Companies
- Real Estate Appraiser, Mantua - Appraisal Services
- Real Estate Appraisers & Consulting Services, Mantua
- Real Estate Services, Mantua
- Record Storage, Destruction & Management, Mantua
- Religious Organizations, Mantua
- Repair Services, Mantua
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- Residential, Mantua
- Residential Apartments, Mantua
- Residential Construction Contractors, Mantua - General Contractors
- Resorts & Hotels, Mantua
- Restaurant Management & Consulting, Mantua - Food Facilities Consultants
- Restaurants/Food & Dining, Mantua
- Riding & Rodeo Services, Mantua
- Roadside Assistance, Road Service & Towing Service, Mantua
- Roofing Consultants, Mantua - Roofing Companies
- Roofing Contractors, Mantua - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rubber Products - Retail, Mantua
- Rv Parks, Mantua
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