- Karaoke, Rockville
- Karaoke Machines, Equipment & Supplies, Rockville
- Key Makers, Rockville - Duplicate, Car & More
- Kids Furniture Repair, Refinishing & Restoring, Rockville
- Kids Furniture Stores, Rockville - Children & Baby Furniture
- Kitchen & Bath Housewares, Rockville
- Kitchen & Bath Housewares Manufacturers, Rockville
- Kitchen & Bath Products & Supplies, Rockville
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- Kitchen & Bath Products & Supplies, Rockville
- Kitchen Cabinets, Rockville - Bathroom Cabinets
- Kitchen Countertops, Bathroom Countertops & Sinks, Rockville - Marble, Granite, Quartz, Laminate, Wood, Formica, Glass, Soapstone, Corian, Solid Surface & Concrete Countertops
- Kitchen Remodeling, Rockville - Kitchen Remodel & Planning Services
- Knit Goods Blocking Services, Rockville
- Korean Churches, Rockville
- Korean Restaurants, Rockville
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