機器
app
automatic
buy
cashier
cellphone
charge
cinema
code
communication
connected
consumer
customer
device
digital
discount
display
electronic
female
hand
intelligent
metro
mobile
money
nfc
parking
pay
paying
payment
phone
qr
quick
response
retail
scan
screen
smart
smartphone
station
subway
system
technology
terminal
ticket
ticketing
touch
train
transaction
transfer
wireless