英文關鍵字
alarm
alert
ambulance
arrest
attention
background
beacon
blink
bright
bulb
bust
car
cleaning
construction
danger
emergency
enforce
enforcer
equipment
fire
flash
flasher
flashlight
illegal
industrial
justice
law
light
orange
police
reflection
repair
rescue
road
rotating
safety
security
sign
signal
siren
squad
traffic
ultrahd
urgency
vehicle
video
warn
yellow