Sentron
防阴极回轰式磁控管(短波电子管), 防阴极反加热式磁控管A-type sentron A型仙台放电管
🗣️ 情景例句
I've never been more relaxed.
我从来没像这样轻松过。
Nothing will come of nothing.
无风不起浪。
What's the time?
几点了？