Tend to focus only on the surface of the form, and the connotation of a lack of national culture, the lack of local cultural identity, geographical characteristics.
往往只注重表面形式，而缺乏民族文化内涵，缺乏本土文化特征，地域特点。
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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