Ammann bars are formed by segments (decorations) on the tiles of a tiling such that forming straight lines with them while tiling forces non-periodicity. Only a few cases are known, starting with Robert Ammann's observations on Penrose tiles, but there is no general explanation or construction. In this article we propose a general method for cut and project tilings based on the notion of subperiods and we illustrate it with an aperiodic set of 36 decorated prototiles related to what we called Cyrenaic tilings.

翻译：安曼铁条由一块砖瓦的片段(装饰品)组成,这种砖瓦在加压非定期性时会形成直线,只有几个例子已知,从罗伯特·安曼关于Penrose砖块的观察开始,但没有一般性的解释或构建。在本篇文章中,我们根据子期的概念提出一个一般的裁剪和项目砖块方法,我们用一套与我们所谓的Cyronaic砖块有关的36个经修饰的板块来加以说明。