surge-protect switch
... surge-proof transformer 防电涌变压器 surge-protect socket 电涌保护插座 surge-protect switch 电涌保护开关 ...
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研究了冲击电流波形对开关型电涌保护器（SPD）的工频续流的影响。
The influence of impulse current waveform on 50 Hz continuous current of switching type surge protective device(SPD) was studied.
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