| 摘要 |
<p>The cashing system is comprised of cards (C1), (C2), ..., (Cn), ..., cashing points (P1), (P2), ..., (Pm), ..., and a computing and control unit. Each card (Cn) carries a reference (Rn) having a present value (Van) comprised between an initial value (Vn) and a zero value. The computing and control unit receives the demand for deduction of a value (V) concerning a card (Cn) and calculates the difference (D = Van - V) and produces an acceptation signal when D is bigger than 0.</p> |
