vacuumtube

常见例句

• Transistors have many advantages over the old-fashioned vacuumtube valves.
  与老式真空管相比,晶体管具有许多优点。
• many advantages over the old-fashioned vacuumtube valves.
  与老式真空管相比，晶体管具有许多优点。
• vacuumtube rectifier
  电子管整流器
• oxide cathode vacuumtube
  氧化物阴极电子管
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