Photosensitive seal machine's basic principle is to use special materials, photosensitive seal surface don't need imprinting in the local form a layer of film, which can penetrate to seal the effect.
光敏印章机的基本原理是利用特殊材料的感光性，在印章表面不需要印迹的地方形成一层不能渗透的膜，从而达到印章的效果。
Meanwhile, it is required that the free-form surface modeling must be able to change the freedom of local and meet all kinds of design requirements.
同时，要求自由曲面的造型必需能够局部地自由加以变更，使其符合各式设计需求。
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