研制了一个内燃机车用齿轮泵的CAD系统。
Develops a CAD system for gear pump design of locomotives.
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本文是DF_4内燃机车火灾预报系统的研制报告。
This paper is a research report on the fire forecast system of DF_4 diesel locomotive.
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模块上移
模块下移
不移动