- Machine Shop & Tool Repair Service, Spring Valley
- Machinery, Supplies & Equipment - Business Production Related, Spring Valley
- Machinery, Supplies & Equipment - Business Supplies Related, Spring Valley
- Machinery, Supplies & Equipment - Construction & Contractor Related, Spring Valley
- Mailbox Rental Services, Spring Valley
- Mailboxes Retail, Spring Valley
- Mailing, Delivery & Courier Service, Spring Valley
- Major Appliances, Spring Valley - Household & Kitchen
- Management Consultants & Services, Spring Valley
- Mandarin Restaurants, Spring Valley
- Manicurists & Pedicurists, Spring Valley
- Manufacturers Agents & Representatives, Spring Valley
- Manufacturing, Spring Valley
- Manufacturing Products, Spring Valley
- Marine Contractors & Designers, Spring Valley
- Marine Products And Services, Spring Valley
- Marine Repair & Service Stations, Spring Valley
- Marine Supplies & Equipment, Spring Valley - Boat Supplies
- Marine Supplies & Equipment Repair, Spring Valley - Boat Supplies & Equipment
- Martial Arts & Self Defense Schools, Spring Valley
- Masonry Contractors, Spring Valley - Stone Mason, Brick Mason - Install & Repair
- Massage Therapy, Spring Valley
- Meat Market, Wholesale & Products, Spring Valley
- Mechanical Engineer, Spring Valley - Mechanical Engineering Service
- Medical Billing Consultants, Spring Valley
- Medical Business Management Services, Spring Valley
- Medical Supplies & Equipment, Spring Valley
- Merchandise Sales Events, Spring Valley
- Merchandising & Marketing Consultants, Spring Valley
- Metal Buildings, Spring Valley - Kits, Homes, Steel Buildings, etc
- Metal Coating & Allied Services, Spring Valley
- Metal Cutting Services, Spring Valley
- Metal Finishers, Spring Valley
- Metal Plating & Polishing, Spring Valley
- Metal Repair Service & Blacksmith, Spring Valley - Iron Works
- Metal Windows, Spring Valley
- Metal Working Machinery, Spring Valley
- Mexican & Latin American Goods & Products Stores, Spring Valley
- Mexican Restaurants, Spring Valley
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- Mini & Self Storage, Spring Valley
- Mining, Spring Valley
- Miscellaneous Household Item Repair, Spring Valley
- Miscellaneous Agriculture, Spring Valley
- Miscellaneous Business Services, Spring Valley
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Spring Valley
- Miscellaneous Government, Spring Valley
- Miscellaneous Industry, Spring Valley
- Miscellaneous Manufacturing, Spring Valley
- Miscellaneous Personal Services, Spring Valley
- Miscellaneous Professional, Spring Valley
- Mobile Home Contractors, Spring Valley
- Mobile Home Improvements & Repairs, Spring Valley
- Mobile Home Parks & Communities , Spring Valley
- Modular & Mobile Homes For Sale, Spring Valley - Manufactured Homes Sale & Service
- Money Transfer Service, Spring Valley
- Mortgage Bankers & Correspondents, Spring Valley
- Mortgage Companies, Spring Valley
- Mortgages & Loans, Spring Valley
- Motion Picture & Television Production Services, Spring Valley
- Motor Vehicle, Spring Valley
- Motor Vehicle Rental & Leasing, Spring Valley
- Motorcycle & Motor Scooters Dealers, Repair & Service, Spring Valley
- Motorcycle Parts, Accessories & Dealers, Spring Valley
- Motorcycle Repair & Service, Spring Valley
- Moving & Storage Supplies & Equipment, Spring Valley
- Moving Companies, Spring Valley
- Moving Supplies & Equipment Rental, Spring Valley
- Moving Truck Rental , Spring Valley
- Muffler Shop & Exhaust Systems, Spring Valley
- Museums, Spring Valley
- Music, Spring Valley
- Music Lessons, Spring Valley
- Music Lessons - Vocal, Spring Valley
- Music Libraries, Spring Valley
- Musical Instrument Manufacturers, Spring Valley
- Musical Instrument Rental, Spring Valley - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Spring Valley
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