On the other hand , it applies multi - tube structure which is in triangle arrange to lower resistance of the structure 二是采用了多管式结构三角型排列来降低其结构阻力。
The studies of predecessors have proved that multi - tube structure has low pressure loss . moreover , the polypropylene filter medium which can be stuck by hot pressure makes it possible to adopt the multi - tube structure 前人的研究已表明管式结构阻力较小,由于聚丙烯材料可热压烫焊的特性能制成滤管才得以采用该种结构。