PA pipes with ninute holes ate used as filter medium in the filter system. The system is of simple construction and will require minimal supervision.
本项研究的过滤系统采用PA微孔管作为过滤介质，结构简单，管理要求不高。
PA pipes with ninute holes ate used as filter medium in the filter system. The system is of simple construction and will require minimal supervision.
本项研究的过滤系统采用PA微孔管作为过滤介质，结构简单，管理要求不高。
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