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单词 θ78457
释义
the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [adjective] > specific quality of valve (1)
soft1897

Electronics. Of a thermionic valve or discharge tube: (a) having had an inert gas introduced into it at the time of manufacture in order to…

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更新时间:2024/11/10 23:57:08