应用卡式电表一定要确保卡交易的安全性。
Application cassette meter must ensure that the card transaction security.
详细讨论了TM卡的特点及其读写电路和软件程序，并简要介绍了一种TM卡收费电表的设计。
The characteristics of a TM card and its reading-writing circuit and software program are discussed in detail, and a design of TM card watt-hour meter is introduced in brief.
介绍了一种新型的智能卡预付费电表的原理、结构及软件设计。
The principle of a new smart card controlled pre-paid utility meter, its construction of system and software design has been introduced.
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