英文關鍵字
airport
alarm
apron
big
blur
blurred
building
business
camera
cctv
checkin
circuit
control
detection
efficiency
electrical
electronic
equipment
female
guard
industry
inside
inspection
lens
monitor
observe
office
operator
outdoor
overhead
passenger
privacy
property
protection
record
runway
safety
security
side
sky
spy
surveillance
system
technology
urban
video
view
visual
watching
white