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White alarm panel featuring a red warning light and red button
sakurai

sakurai

Railroad signal with red warning lights against a blue sky
RISUchyan

RISUchyan

Tall pole with speakers and antenna at the top
yusso photo

yusso photo

Close-up of a yellow rotating light mounted on a pole near a structure
hiro

hiro

Cluster of speakers on a pole against a blue sky
hiro

hiro

Image of a traffic light against a blue sky red light illuminated
pasta

pasta

A white communication tower reaching into a clear blue sky
uhe

uhe

Silhouette of a warning siren and speaker against a black and white landscape
CONY

CONY

Silhouette of a communication tower with speakers against a blue sky
pon

pon

Close-up of a red traffic light against a dark background
mori_hero

mori_hero

Image of a tall communication tower with antennas at the top
ookinate23

ookinate23