Transistors have several advantages over electron tubes.
晶体管和电子管相比有许多优点。
This paper deals with the advantages of transistors over electron tubes.
本文论述晶体管与电子管相比的优点。
An electrode used in certain electron tubes to provide secondary emission.
中间极，二次发射电极一种用于一定电子管作第二次发射电极。
Liquid crystal displays (LCDs) have replaced electron tubes in desk-top PC minitors.
在台式电脑的显示器中，液晶显示屏已经取代电子显像管。
The report summed up the new achievements made in electron tubes, semiconductors and components.
这篇报告总结了电子管、半导体和元件三方面的成就。
This report summed up the new achievements made in electron tubes, semiconductors and components.
本报告总结了电子管、半导体和元件三方面的新成就。
It reacts explosively with cold water and is used to scavenge traces of oxygen and other gases in electron tubes.
铯遇水发生爆炸性反应，极易与氧化合，因而被用作电子管的吸气剂。
Small size and low power consumption are the two important factors that make transistors preferable to electron tubes.
体积小和消耗功率低，这两个重要因素使晶体管比电子管优越。
Branch of science that deals with the study and application of electron devices, e. g., electron tubes, transistors, magnetic amplifiers, etc.
关于电子器件(例如电子管、晶体管、磁放大器等)的研究与应用的一门科学分支。
The electron back bombardment phenomenon, which results in anomalous increase of gun current emission, has been observed in a series of our side coupled standing wave accelerating tubes.
在以半腔为首腔的边耦合驻波加速管中观察到了电子反轰现象，由于电子反轰的结果，导致电于枪发射电流非正常增长。
After transplantation, the autogenous peritoneal tubes were examined and photographed using a scanning electron microscope in different periods.
通过移植后不同时期连续扫描电镜观察腹膜管移植后的内膜变化。
Traveling Wave Tubes (TWTs) are widely used in modern military areas, such as satellite communications, radars, electron warfare and so on.
行波管在电子对抗、雷达和卫星通信等现代通信军事电子领域中得到了日趋广泛的使用。
One is negative electricity, being, in fact, the tiny particle called the electron, familiar to radio fans as one of the particles vast swarms of which operate radio vacuum tubes.
其中一种带负电，实际上我们称它为电子，熟悉半导体收音机的爱好者都知道机器里面的电子管中含有大量的这种电子微粒。
The development and differentiation of epithelial cells, especially of ciliated cells in the fallopian tubes of fetuses aged 10 ~ 38 weeks were studied by light and electron microscopy.
研究采用光镜和电镜技术观察了10 ~38周胎儿输卵管上皮细胞特别是纤毛细胞的发育和分化。
Intense ion and electron beams treats intense charged-particle beams used in vacuum tubes, particle beam technology and experimental installations such as free electron lasers and accelerators.
强烈的离子和电子梁对待在真空管，粒子束技术和实验装备，例如自由电子激光和加速器里使用的强烈的充电粒子束。
In this paper, first authors present a structure of DF electron gun. Simulate and analyze this structure. And then make the DF electron guns and sample tubes.
在本文中，作者首先提出了一种动态聚焦电子枪结构，进行了数值计算与分析，制作了动态聚焦电子枪并装管实验。
This paper presents a method of calculation of the noise figure of power travelling wave tubes which employ a conical Pierce gun to produce the electron beam.
本文给出了采用球形收敛枪的功率行波管噪声系数的计算方法。
Image lag is one of the important characteristics of photoconductivity-type camera tubes with low-velocity electron beam.
惰性是慢电子束扫描光电导型摄象管的重要性能指标之一。
By testing and analyzing the sample tubes. It is confirmed that this type of DF electron guns has good performance and evident DF effects.
通过对实验样管的测试与分析。证实该枪性能良好，动态聚集效果明显。
By testing and analyzing the sample tubes. It is confirmed that this type of DF electron guns has good performance and evident DF effects.
通过对实验样管的测试与分析。证实该枪性能良好，动态聚集效果明显。
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