Magnet is a device which produces a magnetic field external to itself. All magnets have two areas where this field is strongest, the north and south...磁石
recruitment or candidates, human resources, marketing strategies, attracting clients, attracting businessmen and businesswomen standing in rows with magnets in their hands - 馬蹄形磁鐵 幅插畫檔、美工圖案、卡通及圖標磁石, 工程技術, 技能
Magnet is a device which produces a magnetic field external to itself. All magnets have two areas where this field is strongest, the north and south...
Clarke's-type machine patented by Davis and Kidder and made by W H Burnap of Lowell, Massachusetts. It has a horseshoe magnet, two rotating bobbins...美國, 機械
