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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Hexagonal bifrustum ： ウィキペディア英語版 Hexagonal bifrustum The hexagonal bifrustum or truncated hexagonal bipyramid is the fourth in an infinite series of bifrustum polyhedra. It has 12 trapezoid and 2 hexagonal faces. This polyhedron can be constructed by taking a hexagonal dipyramid and truncating the polar axis vertices, making it into two end-to-end frustums. Several types of crystal take this shape.〔.〕 It has also been used in the design of 14-sided dice, which may be used to generate randomly chosen playing cards.〔(Set of five, fourteen sided poker dice ), Patent US 8074986 B1, Douglas A. Gebhart, filed September 30, 2008.〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hexagonal bifrustum」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.