Provide a dividing guide card for every twenty to thirty folders.
每二十至三十个文件夹分别建立目录导卡。
The module guide should have a tree structure, dividing the system into a small number of modules and treating each such module in the same way until all of the modules are quite small.
组件支配应该是一个树形结构，将系统分为少量的组件，每个组件处理方法一致，直到所有组件都变得很小。
A slant Angle of the dividing surfaces is set to one at which the light projected from the light source is reflected in a direction substantially parallel with a plate of the light guide plate.
分割面的倾斜角被设为使从光源投射的光以基本上平行于光导板的板面的方向反射的角度。
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