自由构形是超平面构形中一类重要的构形。
Free arrangement is a very important kind of hyperplane arrangement.
本文主要讨论了超平面构形的模元素及其应用。
The main topic of this thesis is about central hyperplane arrangements with modular elements in their intersection lattice.
PLAGE是32位微型计算机上运行的，用以进行平面构形及三维实体造型，生成产品的两维及三维零件图和装配图的系统。
PLAGE is a comprehensive system running in 32 bit microcomputer, aimed to perform planar and 3D solid modelling, generate 2D and 3D part drawings and assembly drawings.
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