accident
alarm
alert
blueprint
camera
cctv
ceiling
construction
control
danger
design
detector
device
drawing
electronic
emergency
engineering
equipment
fire
hand
home
house
indoors
installing
male
monitoring
monoxide
object
office
paper
people
person
professional
project
protect
protection
rescue
safe
safety
secure
security
sensor
sketch
smoke
sound
symbol
system
technology
test
white
定額
Security and fire sensors and alarm equipment on white background. components for signaling.Security and fire sensors and alarm equipment on white background. components for signaling.の素材 [FY310113735954]
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