an electron tube in which a regulated flow of electrons is produced by thermionic emission from a heated cathode (a conducting structure with a negative electric charge), used esp for controlling the flow of current in an electric circuit
| 单词 | thermionic valve |
| 释义 | thermionic valvenounan electron tube in which a regulated flow of electrons is produced by thermionic emission from a heated cathode (a conducting structure with a negative electric charge), used esp for controlling the flow of current in an electric circuit |
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