The intrusion way of over-voltage like lightning into computer (electronic system) was intro- duced, and the protection methods against over-volt- age from circuits and ground were studied.
介绍了雷电等过电压侵入计算机（或电子设备）系统的途径，研究了如何防止由线路和地线进入的过电压。
We also should take protective measures for the volt power bright spots that produced by the series voltage resonance and the higher harmonic produced by the Electronic Ballast.
采用串联电压谐振产生高压起辉，必须采取过流保护措施。电子镇流器高次谐波的产生及其所带来的危害。
We also should take protective measures for the volt power bright spots that produced by the series voltage resonance and the higher harmonic produced by the Electronic Ballast.
采用串联电压谐振产生高压起辉，必须采取过流保护措施。电子镇流器高次谐波的产生及其所带来的危害。
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