英文關鍵字
access
airport
automatic
barrier
border
boundary
building
business
check
checkpoint
city
closed
control
customs
design
detector
door
electronic
entrance
entry
exit
gate
gateway
hall
hallway
indicator
interior
metal
metro
modern
office
pass
passage
passageway
passenger
people
public
railway
security
station
subway
system
technology
ticket
train
transport
turnstile
underground
urban