- Machine Shop, Frewsburg
- Machine Shop & Tool Repair Service, Frewsburg
- Machinery, Supplies & Equipment - Business Supplies Related, Frewsburg
- Major Appliances, Frewsburg - Household & Kitchen
- Management Consultants & Services, Frewsburg
- Manufacturing, Frewsburg
- Manufacturing Products, Frewsburg
- Marinas & Marina Services, Frewsburg
- Masonry Materials & Supplies, Frewsburg
- Mausoleums Developers, Frewsburg
- Membership Sports & Recreation Clubs, Frewsburg
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- Merchandise Sales Events, Frewsburg
- Metal Buildings, Frewsburg - Kits, Homes, Steel Buildings, etc
- Methodist Church, Frewsburg
- Miscellaneous Agriculture, Frewsburg
- Miscellaneous Government, Frewsburg
- Miscellaneous Personal Services, Frewsburg
- Modular & Mobile Homes For Sale, Frewsburg - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Frewsburg
- Motor Vehicle, Frewsburg
- Motor Vehicle Rental & Leasing, Frewsburg
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