Vacuum tubes are bulky and produce a lot of heat , so first - generation computers were large and required extensive air conditioning to keep them cool 真空管体积大且发热严重,因此第一代计算机体积庞大，并且需要大量的空调设备保持冷却。
Vacuum tubes were crucial to the development of radio , television , and sound recording , and an essential component in early telephone equipment and computers 真空管对广播、电视和录音的发展起着至关紧要的作用，它也是早期的电话设备和电脑的重要组成部分。
Cpus used to be made of vacuum tubes , magnetic cores , and transistors , which were all relatively expensive , slow , and unreliable by today ' s standards Cpu以前是用真空管、磁芯和晶体管做的，以今天的标准来看，这些东西相对价格昂贵，运行速度慢，稳定性也不好。
Information - processing technology has thus far relied on purely charge - based devices ? ranging from the now quaint vacuum tube to today ' s million - transistor microchips 目前资讯工业所使用的元件纯粹是电荷型的，从古老的真空管到今天含有数百万颗电晶体的微晶片都是。
This tube is between metal vacuum tube and all - glass vacuum tube . it can be used in cold area and its price is much low than the metal vacuum tube 介于全玻璃真空管和封装式热管太阳集热器中间的一种太阳集热器,弥补了全玻璃真空管的缺点,借鉴了封装式热管太阳集热器的优点
The first commercial computer , eniac , incorporated 18 , 000 vacuum tubes , weighed 30 tons , filled several large rooms , and consumed enough power to light 10 homes 第一代的商业电脑? ?电子数字积分计算机，合并了18000个真空管，重达30吨，占地面积相当于几间大房间，耗费的能量足够供10个家庭照明。
We have the most advanced manufacturing equipment and all the high - quality raw material of vacuum tube is from linuo group and tianxu group in shandong province 现公司原材料全部采用山东力诺集团、天旭集团的优质毛坯，拥有国内最先进的生产设备，并聘请国内知名企业的专业技术人员参与生产、管理。
