- Machine Shop & Tool Repair Service, Spring Valley
- Machinery, Supplies & Equipment - Business Supplies Related, Spring Valley
- Management Consultants & Services, Spring Valley
- Manifold Business Forms Manufacturers, Spring Valley
- Manufacturing, Spring Valley
- Masonry Materials & Supplies, Spring Valley
- Meat Market, Wholesale & Products, Spring Valley
- Medical Supplies & Equipment, Spring Valley
- Membership Sports & Recreation Clubs, Spring Valley
- Mexican Restaurants, Spring Valley
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- Miscellaneous Government, Spring Valley
- Miscellaneous Photographers, Spring Valley
- Miscellaneous Professional, Spring Valley
- Mortgage Bankers & Correspondents, Spring Valley
- Motor Vehicle, Spring Valley
- Motorcycle Parts, Accessories & Dealers, Spring Valley
- Motorcycle Repair & Service, Spring Valley
- Motorcycles Paint & Refinishing, Spring Valley
- Music, Spring Valley
- Musical Instruments & Equipment Stores, Spring Valley
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