... tractor valve；拖拉机阀 tractor vehicle system；牵引机车车辆系统 tractor wheel；拖拉机车轮 ...
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The driveline for a tractor vehicle is simplified as a 2-DOFs(degree of freedom)torsional vibration system, and is described as a second-order differential equation.
将牵引车的传动系简化为一个2自由度的扭转振动系统，并以二阶微分方程描述。
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