利用电磁铁来搬运钢铁材料的装置叫做电磁起重机。

Transports the steel and iron material using the electro-magnet the installment named electromagnetism hoist crane.

youdao

利用电磁铁来搬运钢铁材料的装置叫做电磁起重机。

Transports the steel and iron material using the electro-magnet the installment named electromagnetism hoist crane.

youdao