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
but there's a letter here addressed to you,
这确实有一封信是寄给你的。
There is no sense in criticizing him.
批评他也没有用。
Yes, it certainly is.
是呀，确实如此。