vacuum-tube detector ==> 真空管检波器=>真空管検波器 vacuum-tube electrometer ==> 真空管静电计 .
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vacuum tube detector 真空管检波器 ; 真空管调制器
VTD Vacuum Tube Detector 真空管调制器
vacuum thermionic tube detector 真空热离子管检波器
vacuum m thermionic tube detector 真空热离子管检波器
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By 1930, such vacuum-tube diodes had all but replaced the quirkier crystal detector.
ECONOMIST: The middle age of the transistor
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