Four security cameras against the blue sky are monitoring. The image has a copy space.
Schlüsselwörter
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system,
equipment,
video,
control,
safety,
guard,
protection,
security,
technology,
sky,
modern,
blue,
surveillance,
electronic,
view,
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street,
industry,
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urban,
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pillar,
white,
big,
building,
brother,
circuit,
secrecy,
alarm,
wall,
danger,
television,
cloud
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