秦始皇巧用磁铁传说秦始皇修建的阿房宫,有座宫门是用磁铁建造的。如果刺客带剑而过,立刻会被吸住,被卫兵当场抓获。马隆的磁石阵《晋书·马隆传》记载:马隆率兵进陕、甘一带,在敌人必经的狭窄道路两边堆放磁石。穿着铁甲的敌兵路过时,被牢牢吸住,不能动弹了。马隆的士兵穿犀甲,磁石对它没有什么作用,可以自由行动。敌人以为神兵,不战而退。 Qin Shi Huang Qiao Qin Shi Huang Qiao Shi built magnet with a magnet, a palace door is built with a magnet. If the assassin with a sword over, will immediately be sucked, captured by the guards on the spot. Malone’s magnet array, “Jin Shu Malone Biography” records: Malone led troops into the Shan, Gan area, the enemy must be placed on both sides of the narrow road magnets. Enemy soldiers wearing armor out of date, was firmly sucked, can not move. Malone’s soldier wearing a rhinoceros, the magnet has no effect on it, you can move freely. Enemy thought that magic, retreat without a fight.