- Machine Shop, Struthers
- Machinery And Equipment Manufacturers, Struthers
- Machinery, Supplies & Equipment - Business Production Related, Struthers
- Machinery, Supplies & Equipment - Business Supplies Related, Struthers
- Major Appliances, Struthers - Household & Kitchen
- Manicurists & Pedicurists, Struthers
- Manufacturing, Struthers
- Manufacturing Products, Struthers
- Massage Therapy, Struthers
- Mental Health Clinics, Struthers - Treatment Centers
- Mental Health Specialists, Struthers - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Repair Service & Blacksmith, Struthers - Iron Works
- Methodist Church, Struthers
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- Mini & Self Storage, Struthers
- Miscellaneous Government, Struthers
- Miscellaneous Personal Services, Struthers
- Miscellaneous Professional, Struthers
- Monuments, Tombstones, Markers & Memorials, Struthers
- Mortgage Bankers & Correspondents, Struthers
- Motor Vehicle, Struthers
- Moving Companies, Struthers
- Muffler Shop & Exhaust Systems, Struthers
- Music, Struthers
- Music Lessons, Struthers
- Music Lessons - Instrumental, Struthers
- Musical Recording Services, Struthers
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