第二个是可在数亿分之一秒的时间里实现数千伏电压的通断，这是一项前所未有的成就。
The second advance is a way of switching thousands of volts on and off in a few billionths of a second, a previously impossible feat.
[color=#000000]第二个是可在数亿分之一秒的时间里实现数千伏电压的通断，这是一项前所未有的成就。
[font=Times New Roman][color=#000000]The second advance is a way of switching thousands of volts on and off in a few billionths of a second, a previously impossible feat.
基于雪崩三极管雪崩效应，研制出了一种数千伏、纳秒级脉冲源。
Based on the avalanche effect, a kind of kilo-volt nanosecond pulsers has been designed, by using microwave PCB (printed circuit board).
根据具体系统指标，选择全固态微波电路方案，研制出了系列的数千伏、纳秒级、超宽带雷达用脉冲源。
Based on the microwave PCB circuit, series of kilo-volt nanosecond UWB radar pulsers have been designed.
在倒数记秒末点，切勿再用120伏(电压)启动循环，否则倒数计秒将重启。
When the end of the countdown is reached, the 120 Volt must not be applied anymore to start a cycle. If not, the countdown will restart.
在倒数记秒末点，切勿再用120伏(电压)启动循环，否则倒数计秒将重启。
When the end of the countdown is reached, the 120 Volt must not be applied anymore to start a cycle. If not, the countdown will restart.
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