您要查找的是不是：
- multicollector electron tube 多集电极电子管
- The transmitter was pulsed by an electron tube. 电子管使发射器产生脉冲波。
- An electron tube having a cathode and an anode. 电子二极管有一个阳极和一个阴极的电子管
- An electron tube or a vacuum tube. 电子管或真空管。
- The second electron tube is out of order. 第二个电子管坏了.
- An electron tube with a photosensitive cathode. 光电管具有感光的阴极电子管
- Out of the electronic tube has come one particularly tough little war baby. 从电子管中产生出一门格外强劲而短暂的战时工业。
- A highly evacuated electron tube containing an anode, a cathode, and a control grid. 三极管带有阳极、阴极和控制栅极的高真空的电子管
- 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
- An electron tube used to amplify or generate ultrahigh frequency by means of velocity modulation. 速调管一种用速度调节的方法放大或产生超高频率的电子管
- Within the last few decades , the electron tube has been largely replaced by the transistor . 在近几十年里，电子管已大大为晶体管所取代。
- Hangzhou Xinanjiang Electronic Tube Factory Co., Ltd. 杭州新安江电子管厂有限公司。
- Electron tubes are the main component for this machine. 真空管是这种机器的主要零件。
- A network or coil of fine wires located between the plate and the filament in an electron tube. 栅极在电子管中线极和阳极之间的由导电性很好的电线组成的网络或线圈
- A positively charged electrode, as of an electrolytic cell, a storage battery, or an electron tube. 阳极，正极电解电池、蓄电池或电子管的正电电极
- Within the last few decades ,the electron tube has been largely replaced by the transistor . 在近几十年里，电子管已大大为晶体管所取代。
- A highly evacuated electron tube containing an anode,a cathode,and a control grid. 三极管带有阳极、阴极和控制栅极的高真空的电子管。
- A negatively charged electrode,as of an electrolytic cell,a storage battery,or an electron tube. 阴极负电极，如电池、蓄电池或电子管的负极
- A positively charged electrode,as of an electrolytic cell,a storage battery,or an electron tube. 阳极，正极电解电池、蓄电池或电子管的正电电极
- The phototube, a very special type of electron tube, is the heart of the talking-picture projector. 光电管，一种非常特殊的电子管，是有声电影放映机的心脏。
