电磁波是由一种称为速调管的微波电子管产生的。
The electromagnetic wave is produced by microwave tubes called klystrons.
因此，磁场的建立、磁系统的设计制造是微波电子管研制工作中的一个重要内容。
Therefore, the establishment of the magnetic field, the design manufacturing of magnetic system is an important content of microwave electronics tube developing.
因此，磁场的建立、磁系统的设计制造是微波电子管研制工作中的一个重要内容。
Therefore, the establishment of the magnetic field, the design manufacturing of magnetic system is an important content of microwave electronics tube developing.
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