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美国桑迪亚国家试验室（ＳａｎｄｉａＮａｔｉｏｎａｌＬａｂｏｒａｔｏｒｉｅｓ）正在试验一种低成本高速列车，以梯状铝金反作用板推动列车，试验原型车的速度高达４８２．７ｋｍ／ｈ，约３ｈ就可从北京抵达上海。这种名为“块式轨道相感应电机”（Ｓｅｒａｐｈｉｍ———
The Sandia National Laboratories is testing a low-cost high-speed train that uses a step-shaped aluminum-gold reaction plate to propel the train up to 482.7km / h and to arrive in Beijing in about 3 hours Shanghai. This is called “block orbital phase induction motor” (Seraphim ---