magnetic blow-out switch

例句：

1. 1. The magnetized iron rod is attracted to the north pole.
   被磁化的铁棒被吸引到北极。
2. 2. The magnetized iron rod can be used to create a strong magnetic field.
   被磁化的铁棒可以用来产生一个强大的磁场。
3. 3. Magnets are used in many applications, such as recording and playing music.
   磁铁在许多应用中都有使用，比如录音和播放音乐。