ic card electric meter chips; multiple fee-rate electric energy meter chips; 0. 5s multi-functional electric energy meter chips; 0. 2s multifunctional watch chips; ic card electric meter scheme; multiple fee-rate electric energy meter scheme; . 5s multi-functional electric energy meter scheme; . 2s multi-functional electric energy meter scheme; time-sharing prepayment electric energy meter scheme; time-sharing prepayment electric energy meter chips; scheme; watch movement; touch timepiece error testing instrument; electric meter scheme