fire sprinkler nozzle white celling automatic protection system buildings |
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| navigate by keyword : alarm alert automatic background building burning business ceiling chrome control danger department detector district emergency equipment extinguish extinguisher extinguishing fire flame hazard head heat house life metal office order physical pressure protect protection residential retardant safe safety security sensor services smoke spray sprinkler sprinkling structure suppression system warning water white |
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| Fire sprinkler nozzle on white celling, automatic fire protection system in buildings, close up |
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