- Warehousing & Storage, Millersville - Warehouse Services
- Washing Machine & Dryer Repair & Service, Millersville
- Waste & Refuse Services & Sites, Millersville
- Waste Disposal, Garbage, Trash & Rubbish Removal Contractors Equipment, Millersville
- Waste Management, Waste Sanitation & Safety Equipment, Millersville
- Water Filters & Purification Systems, Equipment & Supplies, Millersville - Water Filtration Systems Companies
- Water Main & Works Contractors, Millersville - Installation & Repair Services
- Water Sports Equipment Manufacturers, Millersville
- Water Transportation, Except Passenger, Millersville
- Water Treatment & Conditioning Systems, Equipment & Supplies, Millersville - Water Softener Companies
- Water Well Drilling Contractors, Millersville
- Water Well Inspection Testing & Maintenance Contractors, Millersville
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- Water, Sewer & Utility Line Contractors, Millersville - Installation & Repair Services
- Welding & Welder, Millersville - Welding Supplies, Machines, Equipment, Services & Contractors
- Well Drilling Contractors, Millersville
- Well Drilling Equipment & Supplies, Millersville - Water Well & Other Wells
- Window & Blind Cleaning, Millersville
- Window & Door Contractors, Millersville - Installation & Repair Services
- Window Blinds, Shades & Window Treatments and Coverings, Millersville - Roller & Roman Shades - Wood, Metal & Vertical Blinds
- Windows, Millersville - Single & Double Hung, Casement, Sliding, Glass Block, Basement Windows & More
- Windows and Doors, Millersville - Wholesale, Manufacturers & Suppliers
- Wire, Cable & Rope, Millersville
- Wireless & Cellular Communications Equipment & Supplies, Millersville
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