Smoke Detector 09
Smoke Detector 09 :
(1) part of a fire alarm system that detects and signals presence of smoke; (2) self-contained household device for same purpose as (1) but with its own noisemaking device
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(1) part of a fire alarm system that detects and signals presence of smoke; (2) self-contained household device for same purpose as (1) but with its own noisemaking device