本文用多连键图技术来模拟一铁道车辆系统，该系统具有17个自由度。
A railway vehicle system is described using multibond graph technique. The mathematical model of the system has 17 degrees of freedom.
本文应用键图法研究铁道车辆的垂向振动问题。
The bond graph is used to study the vertical vibration of railway vehicles.
在铁道部新的土分类标准中，细粒土由按单纯的塑性指数分类改为按塑性图分类。
In the new classification standard of soil adopted by the Railway Ministry, fine particle soils are classified by plastic index diagram instead of plastic index simply.
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