磁电管

例句：

1. 1. The magneto tube is used to detect magnetic fields.
   磁电管用于检测磁场。
2. 2. The magneto tube was the first electronic device invented by Edison.
   磁电管是爱迪生发明的第一种电子装置。
3. 3. The magneto tube was used in early radio transmissions.
   磁电管在早期的无线电传输中被使用。