Integrated product development is a kind of effective method to solve the integration problem among all periods and function groups during the product development procedure.

集成产品开发是解决产品开发中所有阶段所有职能部门的集成问题、改进产品开发过程的有效方法。

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Then a mathematical programming procedure for loaded tooth contact analysis with friction is developed, which can solve the contact problem in the whole meshing period of hypoid gears effectively;

本文还以一对准双曲面齿轮为例，进行了整个啮合过程的承载接触分析；

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Then a mathematical programming procedure for loaded tooth contact analysis with friction is developed, which can solve the contact problem in the whole meshing period of hypoid gears effectively;

本文还以一对准双曲面齿轮为例，进行了整个啮合过程的承载接触分析；

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