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Prepayment system for supplying water using wireless intelligent card and prepaid method using prepaid system
Prepayment system for supplying water using wireless intelligent card and prepaid method using prepaid system
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机译：使用无线智能卡供水的预付费系统和使用预付费系统的预付费方法
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摘要
A prepayment system for supplying water or gas by means of a wireless intelligent card is described. The present invention also relates to a bidirectional meter specially designed to electronically record the consumption of water or gas.
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