機器
access
airplane
airport
backpack
bag
baggage
check
check in
concept
control
conveyer
conveyor
corridor
counter
departure
departures
detect
detector
entrance
flight
fly
gate
guard
inspection
luggage
man
metal
metal detector
passenger
people
person
policeman
precaution
protection
ray
safety
scan
scanner
search
security
station
system
technology
terminal
transportation
travel
white
xray