The point at which the facets attached had to be able to move without bending at any given edge, so they had to sweep.
钻石切面的连接处必须能动,而且任何一个棱角都不会弯曲,因此这些切面必须进行延伸。
The point at which the facets attached had to be able to move without bending at any given edge, so they had to sweep.
钻石切面的连接处必须能动,而且任何一个棱角都不会弯曲,因此这些切面必须进行延伸。
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