closeup installation and repair electric cable smoke detector fire alarm system before installing stretch suspended |
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| navigate by keyword : abstract alarm architecture background black building bulb cable ceiling cement concrete construction danger design detector electric electrical emergency equipment fire frame gray grey grunge home house industry installation installed lamp light line metal office pattern protection red repair safety security sensor sign smoke structure system technology wall white wires wiring |
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| Closeup installation and repair of electric cable, smoke detector, fire alarm system before installing a stretch or suspended ceiling. Concept of testing fire extinguishing systems, protection |
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