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HK
means Hard Krome in
Commercial
Similar to HK
4WW
- Water Wiggler Water Agitator, model 4
4WW
- Four-Wheeled Walker
95
- version 4.0 of Microsoft Windows
98
- version 4.1 of Microsoft Windows
A/C
- Air Conditioning
AA
- Adjustable Arms
AA
- Air Abrasion
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