4WT-B means Four Wire, Base mounted smoke detector with Thermal Detector in Commercial
Similar to 4WT-B
ACORN - Associations Of Communities Organized For Reform NowACOS - Adjustable Coil Over Spacer
ACP - Aerosol Collector Pyrolyzer
ACQ - Alkaline Copper Quaternary
ACR - Advanced Communications Riser
ACR - Air Conditioning / Refrigeration
ACR - Anti-Camout Ribs
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