| 摘要 |
<p>A service dispenser such as a petrol pump has a payment module (20) which contains a micro controller and a display interface. The display shows volume (42), price/unit (43) and cost (41). The price/unit is alternately displayed in several currencies from which the customer selects by unhooking the pistol during the chosen currency. Thereafter the price and total cost are shown in the selected currency.</p> |
