Vocab InfoA20 Noun真空管(しんくうかん)vacuum tubeDetailsExamples真空管vacuum tubeDetailsExamplesDictionary DefinitionNoun1. vacuum tubeAll Forms真空管 【しんくうかん】DetailsAudioPlayExamplesThere are no sentences available for this contentHold tight, context sentences are coming soon!Self-Study SentencesStudy your own way!Add sentences and study them alongside Bunpro sentences.Try Bunpro