four-wheeled scraper四轮铲运机
little four-wheeled小四轮
four-wheeled vehicle四个轮子的车
four-wheeled chair四轮椅
Four-wheeled vehicles四个轮子的车
four-wheeled car四轮驱动车
four-wheeled cycles四轮自行车
four-wheeled tractor四轮拖拉机
four-wheeled hand truck四轮手推车
In this thesis, the full car model with eight degrees of freedom and four-wheeled random road displacement inputs was established and the differential equation to describe the vehicle random vibration was deduced.
本文建立了一个反映四轮随机输入下车辆振动状况的八自由整车模型，推导出了能描述车辆随机振动的微分方程。
参考来源 - 路面不平顺输入的汽车动力学随机响应分析