機器
admission
autobus
box
bus
card
check
city
control
device
electronic
enter
entrance
europe
handle
identity
indoors
interior
modern
motorbus
passenger
pay
plastic
public
reader
seat
service
smart
system
tallinn
technology
ticket
ticketless
train
tram
tramway
transport
transportation
travel
trolleybus
urban
validate
validating
validation
validator
vehicle
verification