An electromagnet is a magnet that consists of a piece of iron surrounded by a coil.

电磁铁是由线圈包围的铁块组成的磁铁

Discard the electromagnet.

扔掉电磁铁。

Making an electromagnet at home is fun and easy.

在家做一块电磁铁是既简单又有趣的。

Release mechanism controlled by electromagnet.

释放机构采用电磁铁控制。

Lifting electromagnet is a kind of lifting gear.

起重电磁铁是起重工具的一种。

In the same year Argao made the first electromagnet.

同年安高制造了第一个电磁体。