vacuum tube

• Vacuum tube receiver
  真空管接收器
• Vacuum tube modulator
  电子管灯器
• Love vacuum tube iv
  情歌真空管iv
• Love vacuum tube ii
  情歌真空管ii
• Vacuum tube tester
  真空管测试仪
• Vacuum tube amplifiers used the first time in coast - to - coast telco circuits
  真空管放大器首次用于大西洋岸至太平洋岸的电信电路中。
• Before transistors appeared , large and heavy vacuum tubes were used in all radio sets
  晶体管出现之前,所有收音机都用又大又重的真空管
• The first machines used vacuum tubes , electrical relays , and complicated machine - control interfaces
  第一代机器应用电子管、电气继电器、复杂机器控制界面。
• In addition , because vacuum tubes do not operate very fast , these computers were relatively slow
  此外,因为真空管运行不是很快，这些计算机运行速度相对较慢。
• Transistors are smaller and less expensive than vacuum tubes , and they operate faster and produce less heat
  晶体管比真空管体积小、价格低，而且运行快而发热少。