- Safety & Security Systems & Consultants, Defiance
- Scanning Service, Defiance
- Screen Printing, Defiance
- Septic Tanks & Systems, Defiance - Wholesale, Dealers & Suppliers
- Sewer Construction Contractors, Defiance - Sewer Line, Pipe Installation & Repair Services
- Sheet Metal Contractors, Defiance - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Defiance
- Shopping & Shopping Services, Defiance
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- Siding Contractors, Defiance - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Snow Removal Services, Defiance - Snow Plow Service
- Specialty Animal Services, Defiance
- Specialty Stores, Defiance
- Steel & Metal Goods, Defiance - Steel Distributors
- Swimming Pool, Sauna & Spa Contractors, Defiance
- Swimming Pools Contractors, Defiance - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Defiance
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