Spiratron
旋束管(离心静电聚焦行波管), 径向聚束行波管, 螺旋管
🗣️ 情景例句
We're talking about buying
我们在商量购买
Never cackle till your egg is laid.
事竟成，才声张。
sometimes as much as twelve feet in length.
有时长达12英尺。