A scheme used to control self-perpetuating relay was introduced, which was applied in prepay WATT-hour meter design.
通过磁保持继电器在预付费电能表中的应用设计，详细介绍了一种磁保持继电器的控制方案。
A scheme used to control self-perpetuating relay was introduced, which was applied in prepay WATT-hour meter design.
通过磁保持继电器在预付费电能表中的应用设计，详细介绍了一种磁保持继电器的控制方案。
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