2WT-B means Two Wire, Base mounted smoke detector with Thermal detector in Commercial
Similar to 2WT-B
4WT-B - Four Wire, Base mounted smoke detector with Thermal Detector4WW - Four-Wheel Wagon
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
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