1. The potential distribution in space, charge density, the interaction between the needle charge and electric sphere when the needle charge exists outside of the electric sphere were discussed.
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讨论了导体球外存在点电荷时空间的电势分布、导体球表面的电荷密度、点电荷与导体球之间的相互作用力,结果给出即使导体球与点电荷带同种电荷也可以相互吸引。
2. Electric Power Meter:AC Electric Power Meter, Electronic Type Electric Power Meter, Timeslicing Calculate Electric Power Meter, Demand Maximum Electric Power Meter, DC Electric Power Meter;
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电能表:交流电能表、电子式电能表、分时计度(多费率)电能表、最大需量电能表、直流电能表;
3. Electric Power Meter:AC Electric Power Meter, Electronic Type Electric Power Meter, Timeslicing Calculate Electric Power Meter, Demand Maximum Electric Power Meter, DC Electric Power Meter;
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电能表:交流电能表、电子式电能表、分时计度(多费率)电能表、最大需量电能表、直流电能表;
4. Electric Power Meter:AC Electric Power Meter, Electronic Type Electric Power Meter, Timeslicing Calculate Electric Power Meter, Demand Maximum Electric Power Meter, DC Electric Power Meter;
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电能表:交流电能表、电子式电能表、分时计度(多费率)电能表、最大需量电能表、直流电能表;
5. Electric Power Meter:AC Electric Power Meter, Electronic Type Electric Power Meter, Timeslicing Calculate Electric Power Meter, Demand Maximum Electric Power Meter, DC Electric Power Meter;

电能表:交流电能表、电子式电能表、分时计度(多费率)电能表、最大需量电能表、直流电能表;