英文關鍵字
selfcheckout
buy
smartphone
pay
hand
terminal
store
customer
checkout
nfc
supermarket
counter
touch
items
sale
payment
paying
transaction
shop
service
purchase
technology
business
cashier
market
retail
scan
client
contactless
buyer
mall
consumer
transfer
wireless
cashless
employee
commercial
clerk
phone
mobile
banking
system
buying
products