magnet chamshell crane

例句：

1. 1. The magnet attracts iron filings to it.
   磁铁吸引铁屑。
2. 2.Magnets are used in many applications such as data storage and transportation.
   磁铁在许多应用中被使用，如数据存储和运输。
3. 3. The scientist discovered a new type of magnet that can be used for navigation.
   科学家发现了一种可用于导航的新类型的磁铁。