magnetic card file

例句：

1. 1.This magnetic card file is very convenient for storing and retrieving information.
   这个磁性卡文件非常便于存储和检索信息。
2. 2.The magnetic card file is widely used in various industries for data storage.
   磁性卡文件在各种行业中被广泛用于数据存储。
3. 3.The magnetic card file can be easily accessed by scanning the QR code on it.
   通过扫描磁性卡文件上的二维码，可以轻松访问它。