- Machine Shop & Tool Repair Service, Hagersville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Hagersville
- Major Appliances, Hagersville - Household & Kitchen
- Management Consultants & Services, Hagersville
- Manufacturing, Hagersville
- Manufacturing Products, Hagersville
- Masonry Materials & Supplies, Hagersville
- Massage Therapists & Professional, Hagersville
- Massage Therapy, Hagersville
- Medical Supplies & Equipment, Hagersville
- Membership Sports & Recreation Clubs, Hagersville
- Mens & Womens Clothing, Hagersville
- Millwrights, Hagersville
- Mini & Self Storage, Hagersville
- Mining, Hagersville
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- Mining Contractors, Hagersville - Mining Companies, Contractors & Brokers
- Mining, Crude-Oil Production, Hagersville - Mining Companies
- Mirrors, Hagersville - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Government, Hagersville
- Miscellaneous Manufacturing, Hagersville
- Miscellaneous Personal Services, Hagersville
- Miscellaneous Professional, Hagersville
- Mortgage Bankers & Correspondents, Hagersville
- Motor Vehicle, Hagersville
- Motor Vehicle Rental & Leasing, Hagersville
- Moving Truck Rental , Hagersville
- Music, Hagersville
- Music Lessons, Hagersville
- Music Lessons - Instrumental, Hagersville
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