英文關鍵字
access
accessibility
automatic
barrier
board
boundary
card
city
close
commute
commuter
control
depart
destination
door
electronic
enter
entrance
entry
exit
gate
gateway
hand
inspection
light
machine
man
metal
metro
pass
passenger
pay
payment
public
railway
security
station
stile
subway
system
technology
through
ticket
train
transport
transportation
travel
turnstile
underground
wicket