圣约翰学院的威廉·吉尔伯特博士发表了他的《磁论》，这是一本对于导航以及地图制作起重要作用的著作。
Dr William Gilbert of St John's publishes his' DE Magnete ', a scientific work fundamental to the development of navigation and map making.
利用磁与机械力的转换特性，进行了稀土永磁起重吊的研究和设计。
According to the characteristic of transfer of magnetism and mechanical force, rare-earth permanent magnetic lifter was studied and designed.
利用磁与机械力的转换特性，进行了稀土永磁起重吊的研究和设计。
According to the characteristic of transfer of magnetism and mechanical force, rare-earth permanent magnetic lifter was studied and designed.
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