“vacuum-tube voltmeter”的概念、定义、翻译、参考文献-科学参考

单词	vacuum-tube voltmeter
释义	vacuum-tube voltmeter [`vak·yǝm ¦tüb `vōlt´mēd·ǝr] ^ENGINEERING Any of several types of instrument in which vacuum tubes, acting as amplifiers or rectifiers, are used in circuits for the measurement of alternating-current or direct-current voltage. Abbreviated VTVM. Also known as tube voltmeter.
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