然而,目前世界上只有一个磁浮火车铁路系统进行商业营运,就是德国人为上海建设的、全长只有30公里的机场铁路。
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maglev trains have several advantage over other high-speed train , they can reach high speeds and operate more quietly , their guideways need little maintenance , in addition , maglev trains use electric power and therefore produce little pollution themselves ....................................lake