- vacuum tube voltammeter
- 电子管: electron tube duct; canal; v ...
- 伏安计: -示波器组件 voltascope
- 电子管伏特计: electron tube voltmeter; electron tube voltmetre; electronic voltmeter; vacuum tube voltmeter; valve voltmeter
- 电子管微安计: vacuum tube microammeter
- 电子管伏特计电路: vacuum tube voltmeter circuit
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