4W-B means Four Wire, Base mounted smoke detector in
Commercial
Similar to 4W-B
ACQ - Alkaline Copper Quaternary
ACR - Advanced Communications Riser
ACR - Air Conditioning / Refrigeration
ACR - Anti-Camout Ribs
ACRT - Air Conditioning/Refrigeration Technology
ACS - Anti-Clip System
ACS - Air Craft Spruce
View all in Commercial