六极管

例句：

1. 1. The six-pole tube is a type of vacuum tube used in electronic devices.
   六极管是一种用于电子设备中的真空管。
2. 2. The six-pole tube was developed by the Bell Labs in the 1930s.
   六极管是由贝尔实验室在20世纪30年代开发的。
3. 3. The six-pole tube has been widely used in radio and television broadcasting.
   六极管在广播和电视转播中被广泛使用。