- Machine Shop, Sunbury
- Machine Shop & Tool Repair Service, Sunbury
- Machinery And Equipment Manufacturers, Sunbury
- Machinery Custom Design Manufacturers, Sunbury
- Machinery, Supplies & Equipment - Business Production Related, Sunbury
- Machinery, Supplies & Equipment - Business Supplies Related, Sunbury
- Machinery, Supplies & Equipment - Construction & Contractor Related, Sunbury
- Major Appliances, Sunbury - Household & Kitchen
- Management Consultants & Services, Sunbury
- Manicurists & Pedicurists, Sunbury
- Manufacturing, Sunbury
- Manufacturing Products, Sunbury
- Marriage & Family Counselors, Sunbury
- Martial Arts & Self Defense Schools, Sunbury
- Masonry Contractors, Sunbury - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Sunbury
- Membership Sports & Recreation Clubs, Sunbury
- Mental Health Specialists, Sunbury - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Sunbury
- Metal Buildings, Sunbury - Kits, Homes, Steel Buildings, etc
- Metal Finishers, Sunbury
- Metal Plating & Polishing, Sunbury
- Methodist Church, Sunbury
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- Mexican Restaurants, Sunbury
- Mini & Self Storage, Sunbury
- Mining, Sunbury
- Mining Equipment & Supplies, Sunbury
- Mining Equipment & Supplies Service & Repair, Sunbury
- Miscellaneous Household Item Repair, Sunbury
- Miscellaneous Agriculture, Sunbury
- Miscellaneous Business Services, Sunbury
- Miscellaneous Government, Sunbury
- Miscellaneous Jewelry, Sunbury
- Miscellaneous Manufacturing, Sunbury
- Miscellaneous Personal Services, Sunbury
- Miscellaneous Professional, Sunbury
- Mobile Automobile Services, Sunbury
- Motor Vehicle, Sunbury
- Motor Vehicle Rental & Leasing, Sunbury
- Motorcycle & Motor Scooters Dealers, Repair & Service, Sunbury
- Motorcycle Parts, Accessories & Dealers, Sunbury
- Motorcycle Repair & Service, Sunbury
- Moving Companies, Sunbury
- Moving Supplies & Equipment Rental, Sunbury
- Moving Truck Rental , Sunbury
- Museums, Sunbury
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