闸

The blind ram has no space for pipe and is instead blanked off in order to be able to close over a well that does not contain a drillstring.

全封闭防喷器闸板没有给管柱留间隙，仅为了能够关闭没有钻柱的井眼，它是封口的。

Instead, I turned on the tears, bawling like the twins.

但我没说，而是打开了泪闸，哭得像双胞胎妹妹一样。

According to basic theory of overvoltage caused by reclosure and some on-site experiences, the authors prove that under specific condition the overvoltage caused by opening-closing-opening test of circuit breaker is within the range from 2.0 pu to 3.0 pu, thus the existence of risk is circumstantiated, and some suggestions to evade such technical risk are proposed.

作者根据重合闸过电压的基本理论和一些现场实际经验证明了在特定条件下，分合分试验过电压在2~3 pu之间(1 pu=550 kV)，证实了风险的存在，最后提出了规避分合分试验风险的建议。

Integrated gate commutated thyristors are the key components to assure reliable and efficient operation of high power inverters.

集成门极换流晶闸管是大容量变换器高效可靠运行的重要元件。

Gate commutated thyristor is a new high power semiconductor devices based on Gate turn-off thyristor, GCT has extensive application foreground and it is a blank in interiorly now.

门极换流晶闸管是在GTO的基础上开发的一种新型大功率半导体器件，有广阔应用的前景，目前在国内尚属空白。

In media and high voltage large power multi-level converter systems, integrated gate commutated thyristors are widely used due to its outstanding performance.

新型开关器件集成门极换向晶闸管由于其优越的性能在中高压大功率多电平变流器系统中逐渐得到广泛应用。

The fast pulse high voltage DC power with star point modulate unit commutates with low voltage modulator solves the above problems, especially, the dip and overvoltag...

而高压滤波电感可以等效到低压星点处，使滤波电感绝缘等级低，通过提供电感续流通道给星点电感预充电，补偿了高压直流开关合分闸时负载电压跌落和过冲，降低电源动态内阻，加速了脉冲边沿动态响应过程，特别适用于需要快速响应脉冲高压电源的微波功率放大元件

The river had been dammed here to form three lakes.

这条河在这里用闸拦住，形成了三个湖。

On the other hand, with the supply of back-gate forward bias, the current mismatch deceases with increasing the back-gate bias in all operation regions.

另一方面，电流误差会随著背闸顺向偏压的增大而改善。

This method is more practical to the sieving of the thyratrons used in fuze detonating circuits.

这种方法对引信起爆电路用闸流管的检测更具有实际意义

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。