packed bed filter
... output filter 输出滤波器 packed bed filter 填充层过滤器; 滤清器 pan filter 盘式过滤机 ...
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低温热水地面辐射供暖系统由热源，分、集水器，绝热层，加热管，填充层以及管路、阀门、过滤器等组成。
Low temperature hot water floor radiant heating system consists of heat source, and the collector, the heat insulation layer, heating pipe, pipeline, valve, filling layer and filter etc...
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