本文具体从以下几个方面对国产清扫车作了较为全面、深入、的探索和研究。
The dissertation has probed and researched from following several aspects to domestic road sweeper.
本文具体从三个层面对东风公司销售渠道问题进行了研究，并得出了有价值的结论及政策建议。
This paper studies the Dongfeng Motor Corporation's marketing channel from four aspects, and makes valuable conclusions and suggestions on the policy.
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