close fire sprinkler the ceiling for detection and alarm system equipment building |
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| navigate by keyword : alarm alert background building button ceiling close control danger detection detector doorway electronic emergency engineering equipment evacuation extinguish extinguisher extinguishing fire firemen flame heat house industrial office panel pipeline pressure prevent prevention protect protection rescue safe safety security sensor service sign siren smoke spray sprinkler structure system technology warning water when |
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| Close-up fire sprinkler on the ceiling for fire detection and alarm system equipment in building safety security protect and prevent or prevention when heat or flame detector is alert |
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