本论文对组合挂车的转向系统进行研究。
The research in the paper was about the steering system of assembled trailer.
接着，本文重点论述了组合挂车转向机构的优化设计。
Then, this paper focuses on the combination of trailer steering mechanism of the optimal design.
本文对组合挂车的研究为同类研究提供了新的方法和思路，具有一定的现实意义和研究价值。
This combination of trailers on the same research study provides new methods and ideas, has a certain practical significance and research value.
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