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美国伯灵顿北方铁路已经完成了一种被称为槽形煤炭列车的新设计。这种列车能将140辆煤车压缩在115辆常规煤炭列车的长度内,从而增加了每列车净载煤炭的吨数,减少了运输煤炭所需列车的对数。
North Burlington, United States Railroad has completed a new design known as a slotted coal train. The train can compress 140 coal cars over the length of 115 regular coal trains, increasing the tonne of net coal per train and reducing the number of trains required to transport coal.