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White's Ferry alarm switch
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Wheelock strobe at the National Aquarium
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Wheelock speaker and strobe at the National Aquarium
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Wheelock MT at Quincy Adams station
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Wheelock Exceder at The Flats at Shady Grove
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Wheelock Eluxa horn/strobe at Crumbl Cookies [03]
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Wheelock Eluxa horn/strobe at Crumbl Cookies [02]
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Wheelock Eluxa horn/strobe at Crumbl Cookies [01]
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Wheelock 7002T at the American Legion in Silver Spring
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View from Maryland Heights overlook [02]
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Two strobes from different manufacturers
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System Sensor MASS strobe at Micro Center [02]
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System Sensor MASS strobe at Micro Center [01]
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System Sensor MASS strobe at Barnes & Noble
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System Sensor L-Series horn/strobe [04]
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System Sensor L-Series horn/strobe [03]
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System Sensor L-Series horn/strobe [02]
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System Sensor L-Series horn/strobe [01]
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Stair to Red Line at Park Street station
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SpectrAlert strobe at Sears
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SpectrAlert fire alarm horn/strobe at Benjamin Franklin Middle School
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SpectrAlert classic horn/strobe [02]
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SpectrAlert classic horn/strobe [01]
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SpectrAlert Advance with pull station
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SpectrAlert Advance strobe [02]
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SpectrAlert Advance strobe [01]
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SpectrAlert Advance horn/strobe [02]
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SpectrAlert Advance horn/strobe [01]
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SpectrAlert Advance horn/strobe at Big Lots
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SpectrAlert Advance fire alarm strobe
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SpectrAlert Advance at The Inn at Afton
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SpectrAlert Advance at ground level
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SpectrAlert Advance at Frederick Walmart
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Simplex TrueAlert at Mars Supermarket
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Signal X-238 at East 55th Street station
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Rules sign at East 55th Street station
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RTA railcar 827 at Tower City
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Route selector box at East 55th Street station
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Red Wheelock RSS strobe at New York Transit Museum
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Red Line tunnel between Metro Center and Gallery Place
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Red Line train at Gallery Place-Chinatown upper level
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Red Line train arriving at East 55th Street station
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Red Line platforms at Park Street station
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Public address speakers and fire alarm strobes at Greensboro station
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Potter sprinkler alarm
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Platforms at West Falls Church station [05]
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Platforms at West Falls Church station [04]
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Platforms at West Falls Church station [03]
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Platforms at West Falls Church station [02]
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Platforms at West Falls Church station [01]
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Platform pylon at Minnesota Avenue station [02]
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Platform pylon at Minnesota Avenue station [01]
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Platform pylon at Dunn Loring station [03]
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Old and new fire alarms [04]
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Old and new fire alarms [03]
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Old and new fire alarms [02]
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Old and new fire alarms [01]
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No smoking sign at East 55th Street station
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New Carrollton platform pylon
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Metro 6000-Series threshold lighting
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MBTA State station
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MBTA Chinatown station
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Marker graffiti at East 55th Street station
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Marker graffiti at East 55th Street station
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M/V Frisco [05]
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M/V Frisco [04]
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M/V Frisco [03]
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M/V Frisco [02]
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M/V Frisco [01]
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Logico2 carbon dioxide alarm
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Lighted wall signage at Tower City station
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Interior of RTA railcar 827
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Icy fire alarm strobe
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Green Line train at East 55th Street station
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General alarm and public address speaker on the MV New Jersey
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Former City View Center [31]
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Former City View Center [23]
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Former City View Center [22]
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Former City View Center [21]
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Former City View Center [20]