使用江海两用船，运送途中无须中转换装，称为直达运输。
The river-sea-through transportation mode is using a smaller vessel to go to the destination directly.
本论文是受《江海直达干散货顶推运输关键技术研究》研究项目支助，项目号为：2003eg124133。
The paper is supported by the project of the key technical studies of the dry bulk cargo transport of tub-bug systems. Project number is: 2003eg124133.
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