... switching surge 操作过电压，开关浪涌，开关冲击 switching surge overvoltage 操作过电压 switching-surge protective level 开关冲击波保护水平，操作过电压保护水平 ...
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The switching-surge overvoltage of the vacuum circuit breaker can seriously imperil safety of electric system and equipment.
真空断路器的操作过电压严重威胁电力系统和设备的安全。
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