- Machine Shop & Tool Repair Service, Queensville
- Machinery And Equipment Manufacturers, Queensville
- Machinery Custom Design Manufacturers, Queensville
- Major Appliances, Queensville - Household & Kitchen
- Management Consultants & Services, Queensville
- Manufacturing, Queensville
- Manufacturing Products, Queensville
- Masonry Materials & Supplies, Queensville
- Medical Supplies & Equipment, Queensville
- Membership Sports & Recreation Clubs, Queensville
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- Miscellaneous Agriculture, Queensville
- Miscellaneous Government, Queensville
- Miscellaneous Professional, Queensville
- Motor Vehicle, Queensville
- Motorcycle Parts, Accessories & Dealers, Queensville
- Moving Companies, Queensville
- Muffler Shop & Exhaust Systems, Queensville
- Music, Queensville
- Music Lessons, Queensville
- Music Lessons - Instrumental, Queensville
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