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Boston fire alarm street box [02]
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Red Line tunnel between Metro Center and Gallery Place
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Federal Signal 450D horn with VAL strobe [02]
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Federal Signal 450D horn with VAL strobe [01]
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Exterior alarm horn at Shiloh Public School [01]
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Exterior alarm horn at Shiloh Public School [02]
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Exterior alarm horn at Shiloh Public School [03]