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从东风系列机车牵引电动机齿轮箱的设计结构、生产制造、材料、运用、检修等方面分析箱体裂和漏的原因，并提出改造方案和解决措施。
The paper analyzes the reason of box crack and leakage from the design structure, manufacture, material, operation and maintenance of traction motor gear box of Dongfeng series locomotive and puts forward the reform plan and the solution.