产品总体方案评价与优选决策是产品设计过程中的重要步骤，它是决定总体设计之后进行详细设计的关键环节。

The evaluation and optimum selection for product outline schemes is a very important step from conceptual design stage to detail design stage.

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因此，要提高产品的性能，应优化总体方案，协调性能参数，并提高传动系效率。

So, in order to improve the production performance, it should optimize collectivity scheme, correspond performance parameter and improve power train efficient.

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为实现此总体方案，还给出了一些具体产品的选型建议。

To implement the overall scheme, some suggestion is given for the selecting types of some concrete products.

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