为了研究列车中各车辆在直线上和大半径圆曲线上的蛇行稳定性，建立了具有17个自由度的车辆系统非线性数学模型。
In order to study the straight and circular curved track stability of each vehicle in the train set, a mathematical model of vehicle system with 17 freedom degrees was set up.
这种设备生产出的滴丸圆度、重量等参数稳定，质量得得到了保证。
The pills produced by the machine are stable in the parameters of the rotundity and the weight, thus the quality is guaranteed.
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