4W-B means Four Wire, Base mounted smoke detector in Commercial
Similar to 4W-B
ACM - Accumulated Call MeterACM - Asbestos Contaminated Material
ACM - Air Conditioning Motor
ACM - All China Made
ACMV - Air Conditioning Mechanical Ventilation
ACMV - Assist Controlled Mechanical Ventilation
ACORN - Associations Of Communities Organized For Reform Now
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