electromagnetic disk single-track crane

例句：

1. 1.The computer uses an electromagnetic disk to store and retrieve data.
   计算机使用一个电磁盘来存储和检索数据。
2. 2. The engineer designed a new electromagnetic disk that can store more information.
   工程师设计了一种新的电磁盘，可以存储更多的信息。
3. 3. The scientist found that the electromagnetic disk could be used to transmit signals at high speeds.
   科学家发现电磁盘可以用来以高速传输信号。