另一方面，如果可能，一个物理模型以符合产品要求的方式，并且按初始比例简化，以便使任何人都能在设计和造型上做出正确的评价。

On the other hand, if possible, a physical model to meet the product requirements, and according to the initial ratio of simplified, so that anyone can design and modeling of the correct evaluation.

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