Ways to reduce engine noise for small-wheeled tractors have been indicated.
为小四轮拖拉机发动机的降噪指明了方向。
This paper discusses the parameters of trailer air brake system and trailers for small wheeled tractors.
介绍了小四轮拖拉机挂车气刹系统与挂车参数；
This paper discusses the parameters of trailer air brake system and trailers for small wheeled tractors.
介绍了小四轮拖拉机挂车气刹系统与挂车参数；
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