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
But Dad is always so busy.
但是爸爸总是那么忙。
Where do I pick up the ticket?
我什么地方拿机票？
Have you decided which boat to take, Sir?
先生，您决定用哪只船了吗？