Prism also contains base classes which can simplify this whole process.
棱镜也包含基类可以简化整个过程。
The prism is white prefabricated concrete with a fluted base able to introduce horizontal light.
棱柱体是白色预制的混凝土，下面一个凹槽底座能够引入水平的光线。
The utility model discloses a projection screen, which comprises a pyramid prism array, a reflective film and a base material.
本实用新型公开一种投影荧幕，包括一角锥棱镜阵列、一反射膜及一基材。
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