运用现代设计理论，以自动冲切机为例，论述了机械产品原理方案设计的方法。
Applying the theory of modern design and taking the automatic severing machine for example, discusses the technique on design of the principle scheme for mechanical products.
应用反求工程理论，以自动冲切机的反求设计为例，论述了原理方案反求设计的方法。
Applying the theory of reverse engineering and taking reverse design of the automatic severing machine for example, this paper discusses the technique on reverse design of the principle scheme.
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