4WT-B means Four Wire, Base mounted smoke detector with Thermal Detector in
Commercial
Similar to 4WT-B
AACTS - Automated Accelerated Characterization Test System
AAE - Advanced Action Engine
AAE - Atmospheric Air Ejector
AAFI - Air Assisted Fuel Injector
AART - Alternative Assembly and Reflow Techniques
ABC - Altek Bar Code
ABC - American Brilliant Cut
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