英文關鍵字
airport
bag
baggage
border
business
businessman
camera
check
checkpoint
computer
control
conveyor
counter
customs
departure
detector
equipment
gate
guard
holiday
indoors
inspect
inspection
interior
international
luggage
man
metal
modern
monitor
nobody
passenger
person
police
protection
safety
scan
scanner
security
sensor
suitcase
surveillance
system
technology
terminal
terrorism
terrorist
transportation
travel
xray