拦污栅包括拦污栅栅叶和拦污栅槽两部分，栅叶是由栅面和支承框架组成；
The trash rack contains trash rack bar and trash rack groove; the bar is composed with grid surface and support frame;
一个替代实施例包括用于将过滤系统定位在除回风管之外的管路等等中的支承框架。
An alternate embodiment includes a support frame for positioning the filtration system in ductwork or the like other than a return air inlet.
圆形支承框架（6），该圆形支承框架水平安装在旋转框架（4）上，并相对于竖直中心旋转轴线同心；
A circular support frame (6) is horizontally attached to the rotation frame (4), concentrically in relation to the vertical central rotation axis.
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